Adjusting structure, preparation method thereof and display panel

Abstract

The invention relates to an adjusting structure, a preparation method thereof and a display panel. According to the display panel, the adjusting structure is arranged on the light-emitting layer, the black photosensitive particles are arranged in the adjusting structure, when the display panel is in the bright state, the emergent light of the light-emitting unit irradiates the black photosensitive particles, and the black photosensitive particles move to the positions corresponding to the first gaps; therefore, the black photosensitive particles at the light-emitting units which emit light move towards the first gaps which do not emit light, the content of the black photosensitive particles at the light-emitting units is reduced, the brightness at the light-emitting units is increased, the content of the black photosensitive particles at the first gaps is increased, the brightness at the first gaps is reduced, and the contrast ratio of the display panel is further increased.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to an adjustment structure and a preparation method thereof, and a display panel. Background Art

[0002] Today, the new display field is developing rapidly, and people's demand for full screen or ultra-large screen is gradually increasing. MLED is the general name for sub-millimeter light-emitting diodes (Mini LED) and micron light-emitting diodes (Micro LED). MLED has the advantages of fast response, high color gamut, high PPI, and low energy consumption, and has gradually developed into a hot spot in future display technology.

[0003] The current Mini LED and Micro LED technologies are relatively complex, especially the mass transfer technology and miniaturization of LED particles. The current MLED display panel process can be roughly divided into: backplane production, black oil production, SMT (Surface Mounted Technology), flip chip film bonding, assembly and other processes.

[0004] The purpose of SMT is to transfer MLED to the backplane. The main processes include: loading, solder paste screen printing, solder paste inspection (English: Solder Paste Inspection, referred to as SPI), LED transfer, automatic optical inspection (English: automatic optic inspection, referred to as AOI), reflow soldering, AOI, automatic rework machine, sealing, lighting aging test, etc.

[0005] There are currently two sealing solutions: one is to seal the entire surface with black glue, which will block 50% of the emitted light, resulting in a decrease in the brightness of the display panel; the surface of the black glue is uneven and the ink color consistency is poor. The other is to seal between two adjacent LEDs and then set a transparent epoxy layer on the entire surface. In this solution, the black glue is uneven, has poor flatness, a complex process, and different contrasts in different places; the transparent epoxy layer is uneven, and the severity of light diffuse reflection varies in different places, affecting the viewing experience. Summary of the invention

[0006] The object of the present invention is to provide an adjustment structure and a preparation method thereof as well as a display panel, which can solve the problems existing in the existing display panels, such as low brightness, uneven sealing surface, low contrast, complex process flow, low efficiency, etc.

[0007] In order to solve the above problems, the present invention provides a display panel, which includes: a substrate; a light-emitting layer, which is arranged on the substrate; the light-emitting layer includes a plurality of light-emitting units, and a first gap is provided between any two of the light-emitting units; and an adjustment structure, which is arranged on a side of the light-emitting layer away from the substrate, and the adjustment structure has a plurality of black photosensitive particles; when the display panel is in a bright state, the emitted light of the light-emitting unit irradiates the black photosensitive particles, and the black photosensitive particles move to a position corresponding to the first gap.

[0008] Furthermore, when the display panel is in a dark state, the black photosensitive particles are evenly distributed in the adjustment structure.

[0009] Furthermore, the black photosensitive particles include a substrate and a modified layer surrounding the substrate; the modified layer material includes a chemical substance with photocatalytic properties.

[0010] Furthermore, the material of the substrate includes black carbon powder or graphite; and the material of the modified layer includes bismuth iodide oxide.

[0011] Furthermore, the adjustment structure also includes: a first transparent substrate, arranged on a side of the light-emitting layer away from the substrate; a second transparent substrate, arranged opposite to the first transparent substrate and located on a side of the first transparent substrate away from the substrate; a transparent liquid, arranged between the first transparent substrate and the second transparent substrate; and a frame glue surrounding the transparent liquid and located between the first transparent substrate and the second transparent substrate; wherein the black photosensitive particles are distributed in the transparent liquid.

[0012] Furthermore, each of the light-emitting units includes: at least one red LED, at least one green LED and at least one blue LED; the photosensitivity energy of each of the black photosensitive particles is smaller than the photon energy of the red light emitted by the red LED.

[0013] Furthermore, the display panel further includes: a plurality of light shielding units, which are arranged on the surface of the substrate on a side close to the light-emitting layer and correspond one-to-one to the first gaps.

[0014] In order to solve the above problems, the present invention also provides a method for preparing a display panel, which includes the following steps: preparing a light-emitting layer on a substrate, the light-emitting layer including a plurality of light-emitting units, and a first gap between any two of the light-emitting units; and preparing an adjustment structure on a side of the light-emitting layer away from the substrate, the adjustment structure having a plurality of black photosensitive particles; when the display panel is in a bright state, the output light of the light-emitting unit irradiates the black photosensitive particles, and the black photosensitive particles move to a position corresponding to the first gap.

[0015] Furthermore, when the display panel is in a dark state, the black photosensitive particles are evenly distributed in the adjustment structure.

[0016] Furthermore, the step of preparing the adjustment structure on the side of the light-emitting layer away from the substrate includes: providing a first transparent substrate; preparing a frame glue on the first transparent substrate, the frame glue and the first transparent substrate forming a receiving cavity; adding a transparent liquid into the receiving cavity; adding black photosensitive particles into the transparent liquid; arranging a second transparent substrate on the side of the frame glue away from the first transparent substrate, the first transparent substrate, the frame glue, the transparent liquid, the black photosensitive particles and the second transparent substrate together form the adjustment structure; arranging the adjustment structure on the side of the light-emitting layer away from the substrate by a process selected from the group consisting of molding, gluing, bonding and electrostatic adsorption.

[0017] The advantages of the present invention are: the present invention sets an adjustment structure on the light-emitting layer, and a plurality of black photosensitive particles are arranged in the adjustment structure. When the display panel is in a bright state, the output light of the light-emitting unit irradiates the black photosensitive particles, and the black photosensitive particles move to the position corresponding to the first gap, thereby making the black photosensitive particles at the light-emitting unit move to the first gap that does not emit light, reducing the content of black photosensitive particles at the light-emitting unit, increasing the brightness at the light-emitting unit, increasing the content of black photosensitive particles at the first gap, reducing the brightness at the first gap, and thus increasing the contrast of the display panel.

[0018] The present invention removes the entire black glue on the light-emitting layer of the prior art, avoiding the problems of low brightness and poor quality in the prior art. The present invention removes the black oil between the light-emitting units of the prior art, avoiding the problems of low contrast, complex process flow, low efficiency, etc. in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 is a schematic structural diagram of the display panel of Example 1 in a dark state;

[0021] Figure 2 is a schematic structural diagram of the display panel of Example 1 in a bright state;

[0022] Figure 3 It is a schematic diagram of the structure of black photosensitive particles;

[0023] Figure 4 is a diagram of the steps for preparing the display panel of Example 1;

[0024] Figure 5 is a schematic diagram of preparing a sealant on a first transparent substrate;

[0025] Figure 6 It is a schematic diagram of preparing a transparent liquid in a receiving cavity formed by a first transparent substrate and a frame glue;

[0026] Figure 7 It is a schematic diagram of adding black photosensitive particles into a transparent liquid;

[0027] Figure 8 It is a schematic diagram of preparing a second transparent substrate on a side of the frame glue away from the first transparent substrate;

[0028] Fig. 9 is a schematic structural diagram of the display panel of Example 2 in a dark state;

[0029] Fig.10 is a schematic structural diagram of the display panel of Example 2 in a bright state.

[0030] Description of reference numerals:

[0031] 100. Display panel;

[0032] 1. Substrate; 2. Light-emitting layer;

[0033] 3. Adjustment structure; 4. Thin film transistor layer;

[0034] 5. a first gap; 6. a shading unit;

[0035] 21. Light emitting unit; 211. Red LED;

[0036] 212, green LED; 213, blue LED;

[0037] 31. a first transparent substrate; 32. a second transparent substrate;

[0038] 33. Transparent liquid; 34. Frame glue;

[0039] 35. Black photosensitive particles; 36. Accommodation cavity;

[0040] 351. substrate; 352. modified layer. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present invention are described in detail below in conjunction with the drawings in the specification, so as to fully introduce the technical content of the present invention to those skilled in the art, to illustrate that the present invention can be implemented, to make the technical content disclosed in the present invention clearer, and to make it easier for those skilled in the art to understand how to implement the present invention. However, the present invention can be embodied through many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned in the text, and the description of the embodiments below is not intended to limit the scope of the present invention.

[0042] The directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only directions in the drawings. The directional terms used in this article are used to explain and illustrate the present invention, rather than to limit the scope of protection of the present invention.

[0043] In the drawings, components with the same structure are represented by the same numerical numerals, and components with similar structures or functions are represented by similar numerical numerals. In addition, for ease of understanding and description, the size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component.

[0044] Example 1

[0045] This embodiment provides a display panel 100. In this embodiment, the display panel is a Mini LED display panel. In other embodiments, the display panel 100 may also be a Micro LED display panel.

[0046] like Figure 1 , Figure 2 As shown, the display panel 100 includes: a substrate 1 , a light-emitting layer 2 and a regulating structure 3 .

[0047] The substrate 1 includes: one of a glass plate, a printed circuit board, a BT resin plate and an aluminum plate. In this embodiment, the substrate 1 is a glass plate.

[0048] In this embodiment, the display panel 100 further includes a thin film transistor layer 4. The thin film transistor layer 4 is disposed between the substrate 1 and the light emitting layer 2. The light emitting layer 2 is electrically connected to the thin film transistor layer 4, and the thin film transistor layer 4 is mainly used to drive the light emitting layer 2 to perform light emitting display.

[0049] In other embodiments, a driver chip may be electrically connected to the light emitting layer 2, and the driver chip may be used to drive the light emitting layer 2 to perform light emitting display. The driver chip may be a Micro IC or a PM driver IC.

[0050] The light emitting layer 2 is disposed on the surface of the thin film transistor layer 4 which is away from the substrate 1 .

[0051] The light-emitting layer 2 includes a plurality of light-emitting units 21 , and a first gap 5 is provided between any two of the light-emitting units 21 . Each of the light-emitting units 21 includes: at least one red LED 211 , at least one green LED 212 , and at least one blue LED 213 .

[0052] The display panel 100 of this embodiment further includes a plurality of shading units 6. The shading units 6 are arranged on the surface of the thin film transistor layer 4 on the side close to the light emitting layer 2, and correspond to the first gaps 5 one by one. That is, a shading unit 6 is provided on the surface of the thin film transistor layer 4 on the side close to the light emitting layer 2 in each of the first gaps 5. The projection of the shading unit 6 on the substrate 1 in this embodiment overlaps with the projection of the first gap 5 on the substrate 1. The shading unit 6 can be a shading material such as epoxy black oil or silicone black oil.

[0053] The adjustment structure 3 is disposed on a side of the light emitting layer 2 away from the substrate 1 . The adjustment structure 3 includes: a first transparent substrate 31 , a second transparent substrate 32 , a transparent liquid 33 , a sealant 34 and a plurality of black photosensitive particles 35 .

[0054] The first transparent substrate 31 is disposed on the side of the light emitting layer 2 away from the substrate 1. In this embodiment, the material of the first transparent substrate 31 is PET resin. This ensures that the adjustment structure 3 has good light transmittance. In other embodiments, the first transparent substrate 31 can also be prepared by other transparent materials.

[0055] The second transparent substrate 32 is arranged opposite to the first transparent substrate 31 and is located on the side of the first transparent substrate 31 away from the substrate 1. In this embodiment, the material of the second transparent substrate 32 is PET resin. This ensures that the adjustment structure 3 has good light transmittance. In other embodiments, the second transparent substrate 32 can also be prepared by other transparent materials.

[0056] The transparent liquid 33 is disposed between the first transparent substrate 31 and the second transparent substrate 32. In this embodiment, the transparent liquid 33 is made of PVA resin, thereby ensuring that the adjustment structure 3 has good light transmittance. In other embodiments, the transparent liquid 33 can also be prepared by other transparent materials.

[0057] The sealant 34 surrounds the transparent liquid 33 and is located between the first transparent substrate 31 and the second transparent substrate 32 .

[0058] The black photosensitive particles 35 are distributed in the transparent liquid 33 .

[0059] like Figure 3 As shown, the black photosensitive particles 35 include a substrate 351 and a modified layer 352 surrounding the substrate 351. In this embodiment, the material of the substrate 351 includes black carbon powder; the material of the modified layer 352 includes bismuth iodide oxide. In other embodiments, the material of the substrate 351 may also include graphite; the material of the modified layer 352 may also include other chemical substances with photocatalytic properties.

[0060] The emission wavelength of the red LED 211 is generally 615-650 nm; the emission wavelength of the green LED 212 is 495-530 nm; and the emission wavelength of the blue LED 213 is 450-480 nm.

[0061] According to the formula E=hc / λ, E represents energy, h is Planck's constant, c is the speed of light in a vacuum, and λ is the wavelength. Since the red LED 211 has the longest wavelength, the photon energy of the red light it emits is the smallest; the blue LED 213 has the shortest wavelength, and the photon energy of the blue light it emits is the largest; the wavelengths of other colors are between red light and blue light, that is, the photon energy of other colors is between the photon energy of red light and the photon energy of blue light. The photosensitive energy of each of the black photosensitive particles 35 is less than the photon energy of the red light emitted by the red LED 211, so when the red light emitted by the red LED 211 illuminates the black photosensitive particles 35, the energy obtained by the illuminated side of the black photosensitive particles 35 is not equal to the energy obtained by the unilluminated side, which stimulates the black photosensitive particles 35 to move. The photon energy of other light rays is greater than the photon energy of red light, so that it can be ensured that the black photosensitive particles 35 can obtain energy from any color of light and move away from light.

[0062] like Figure 1 As shown, when the display panel 100 is in a dark state, the black photosensitive particles 35 are not irradiated, the energy obtained on the surfaces of the black photosensitive particles 35 is the same, and the black photosensitive particles 35 are evenly distributed in the adjustment structure 3 .

[0063] like Figure 2 As shown, when the display panel 100 is in a bright state, the emitted light of the light-emitting unit 21 irradiates the black photosensitive particles 35, and the black photosensitive particles 35 move to the position corresponding to the first gap 5. As a result, the black photosensitive particles 35 at the light-emitting unit 21 that emits light move to the first gap 5 that does not emit light, reducing the content of the black photosensitive particles 35 at the light-emitting unit 21, increasing the brightness at the light-emitting unit 21, increasing the content of the black photosensitive particles 35 at the first gap 5, reducing the brightness at the first gap 5, making the light-emitting unit 21 brighter and the first gap 5 darker, thereby increasing the contrast of the display panel 100.

[0064] The display panel 100 of this embodiment removes the entire black glue on the light-emitting layer 2 of the prior art, thereby avoiding the problems of low brightness and poor quality in the prior art.

[0065] like Figure 4 As shown, this embodiment also provides a method for preparing the display panel 100 of this embodiment, which includes the following steps: S10: preparing a light-emitting layer 2 on a substrate 1, wherein the light-emitting layer 2 includes a plurality of light-emitting units 21, and a first gap 5 is provided between any two of the light-emitting units 21; and S20: preparing an adjustment structure 3 on a side of the light-emitting layer 2 away from the substrate 1, wherein the adjustment structure 3 has a plurality of black photosensitive particles 35; when the display panel 100 is in a bright state, the emitted light of the light-emitting unit 21 irradiates the black photosensitive particles 35, and the black photosensitive particles 35 move to a position corresponding to the first gap 5. When the display panel 100 is in a dark state, the black photosensitive particles 35 are evenly distributed in the adjustment structure 3.

[0066] like Figure 5 As shown, S20 includes: providing a first transparent substrate 31 ; preparing a sealant 34 on the first transparent substrate 31 , wherein the sealant 34 and the first transparent substrate 31 form a receiving cavity 36 .

[0067] like Figure 6 As shown, S20 also includes: adding a transparent liquid 33 into the receiving chamber 36 .

[0068] like Figure 7 As shown, S20 also includes: adding black photosensitive particles 35 into the transparent liquid 33.

[0069] like Figure 8 As shown, S20 also includes: arranging a second transparent substrate 32 on the side of the sealant 34 away from the first transparent substrate 31 , and the first transparent substrate 31 , the sealant 34 , the transparent liquid 33 , the black photosensitive particles 35 and the second transparent substrate 32 together form the adjustment structure 3 .

[0070] Wherein, S20 also includes: disposing the adjustment structure 3 on the side of the light-emitting layer 2 away from the substrate 1 by a process selected from the group consisting of molding, gluing, bonding and electrostatic adsorption.

[0071] Example 2

[0072] This embodiment provides a display panel 100. In this embodiment, the display panel is a Mini LED display panel. In other embodiments, the display panel 100 may also be a Micro LED display panel.

[0073] like Fig. 9 , Fig.10As shown, the display panel 100 includes: a substrate 1 , a light-emitting layer 2 and a regulating structure 3 .

[0074] The substrate 1 includes: one of a glass plate, a printed circuit board, a BT resin plate and an aluminum plate. In this embodiment, the substrate 1 is a glass plate.

[0075] In this embodiment, the display panel 100 further includes a thin film transistor layer 4. The thin film transistor layer 4 is disposed between the substrate 1 and the light emitting layer 2. The light emitting layer 2 is electrically connected to the thin film transistor layer 4, and the thin film transistor layer 4 is mainly used to drive the light emitting layer 2 to perform light emitting display.

[0076] In other embodiments, a driver chip may be electrically connected to the light emitting layer 2, and the driver chip may be used to drive the light emitting layer 2 to perform light emitting display. The driver chip may be a Micro IC or a PM driver IC.

[0077] The light emitting layer 2 is disposed on the surface of the thin film transistor layer 4 which is away from the substrate 1 .

[0078] The light-emitting layer 2 includes a plurality of light-emitting units 21 , and a first gap 5 is provided between any two of the light-emitting units 21 . Each of the light-emitting units 21 includes: at least one red LED 211 , at least one green LED 212 , and at least one blue LED 213 .

[0079] The adjustment structure 3 is disposed on a side of the light emitting layer 2 away from the substrate 1 . The adjustment structure 3 includes: a first transparent substrate 31 , a second transparent substrate 32 , a transparent liquid 33 , a sealant 34 and a plurality of black photosensitive particles 35 .

[0080] The first transparent substrate 31 is disposed on the side of the light emitting layer 2 away from the substrate 1. In this embodiment, the material of the first transparent substrate 31 is PET resin. This ensures that the adjustment structure 3 has good light transmittance. In other embodiments, the first transparent substrate 31 can also be prepared by other transparent materials.

[0081] The second transparent substrate 32 is arranged opposite to the first transparent substrate 31 and is located on the side of the first transparent substrate 31 away from the substrate 1. In this embodiment, the material of the second transparent substrate 32 is PET resin. This ensures that the adjustment structure 3 has good light transmittance. In other embodiments, the second transparent substrate 32 can also be prepared by other transparent materials.

[0082] The transparent liquid 33 is disposed between the first transparent substrate 31 and the second transparent substrate 32. In this embodiment, the transparent liquid 33 is made of PVA resin, thereby ensuring that the adjustment structure 3 has good light transmittance. In other embodiments, the transparent liquid 33 can also be prepared by other transparent materials.

[0083] The sealant 34 surrounds the transparent liquid 33 and is located between the first transparent substrate 31 and the second transparent substrate 32 .

[0084] The black photosensitive particles 35 are distributed in the transparent liquid 33 .

[0085] like Figure 3 As shown, the black photosensitive particles 35 include a substrate 351 and a modified layer 352 surrounding the substrate 351. In this embodiment, the material of the substrate 351 includes black carbon powder; the material of the modified layer 352 includes bismuth iodide oxide. In other embodiments, the material of the substrate 351 may also include graphite; the material of the modified layer 352 may also include other chemical substances with photocatalytic properties.

[0086] The emission wavelength of the red LED 211 is generally 615-650 nm; the emission wavelength of the green LED 212 is 495-530 nm; and the emission wavelength of the blue LED 213 is 450-480 nm.

[0087] According to the formula E=hc / λ, E represents energy, h is Planck's constant, c is the speed of light in a vacuum, and λ is the wavelength. Since the red LED 211 has the longest wavelength, the photon energy of the red light it emits is the smallest; the blue LED 213 has the shortest wavelength, and the photon energy of the blue light it emits is the largest; the wavelengths of other colors are between red light and blue light, that is, the photon energy of other colors is between the photon energy of red light and the photon energy of blue light. The photosensitive energy of each of the black photosensitive particles 35 is less than the photon energy of the red light emitted by the red LED 211, so when the red light emitted by the red LED 211 illuminates the black photosensitive particles 35, the energy obtained by the illuminated side of the black photosensitive particles 35 is not equal to the energy obtained by the unilluminated side, which stimulates the black photosensitive particles 35 to move. The photon energy of other light rays is greater than the photon energy of red light, so that it can be ensured that the black photosensitive particles 35 can obtain energy from any color of light and move away from light.

[0088] like Fig. 9 As shown, when the display panel 100 is in a dark state, the black photosensitive particles 35 are not irradiated, the energy obtained on the surfaces of the black photosensitive particles 35 is the same, and the black photosensitive particles 35 are evenly distributed in the adjustment structure 3 .

[0089] like Fig.10 As shown, when the display panel 100 is in a bright state, the emitted light of the light-emitting unit 21 irradiates the black photosensitive particles 35, and the black photosensitive particles 35 move to the position corresponding to the first gap 5. As a result, the black photosensitive particles 35 at the light-emitting unit 21 that emits light move to the first gap 5 that does not emit light, reducing the content of the black photosensitive particles 35 at the light-emitting unit 21, increasing the brightness at the light-emitting unit 21, increasing the content of the black photosensitive particles 35 at the first gap 5, reducing the brightness at the first gap 5, making the light-emitting unit 21 brighter and the first gap 5 darker, thereby increasing the contrast of the display panel 100.

[0090] The display panel 100 of this embodiment removes the entire black glue on the light-emitting layer 2 of the prior art, thereby avoiding the problems of low brightness and poor quality in the prior art. The display panel 100 of this embodiment removes the black oil between the light-emitting units of the prior art, thereby avoiding the problems of low contrast, complex process flow, low efficiency, etc. in the prior art.

[0091] Furthermore, the above is a detailed introduction to a display panel and a preparation method thereof provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A regulating structure, characterized in that: include: a first transparent substrate; A second transparent substrate is arranged opposite to the first transparent substrate and spaced apart from the first transparent substrate; A transparent liquid is disposed between the first transparent substrate and the second transparent substrate; as well as A frame glue surrounds the transparent liquid and is located between the first transparent substrate and the second transparent substrate; as well as A plurality of black photosensitive particles are distributed in the transparent liquid, wherein the black photosensitive particles include a substrate and a modified layer surrounding the substrate; the modified layer material includes a chemical substance having photocatalytic properties; The black photosensitive particles are not irradiated by light, and are evenly distributed in the transparent liquid. When the black photosensitive particles are irradiated by light, they move in the transparent liquid to avoid light.

2. The adjustment structure according to claim 1, characterized in that: The material of the substrate includes black carbon powder or graphite; the material of the modified layer includes bismuth iodide oxide.

3. The adjustment structure according to claim 1, characterized in that: The photosensitivity energy of the black photosensitive particles is less than the photon energy of the red light emitted by the red LED.

4. A display panel, characterized in that: Comprising the regulating structure as described in any one of claims 1-3.

5. The display panel according to claim 4, characterized in that: The display panel also includes: a substrate and a light-emitting layer, wherein the light-emitting layer is arranged on the substrate; the light-emitting layer includes a plurality of light-emitting units, and a first gap is provided between two adjacent light-emitting units; the adjustment structure is provided on a side of the light-emitting layer away from the substrate, and when the display panel is in a bright state, the emitted light of the light-emitting unit irradiates the black photosensitive particles, and the black photosensitive particles move to a position corresponding to the first gap, and when the display panel is in a dark state, the black photosensitive particles are evenly distributed in the adjustment structure.

6. The display panel according to claim 5, characterized in that: Each of the light-emitting units includes: at least one red LED, at least one green LED and at least one blue LED; the display panel also includes a thin film transistor layer, which is arranged on the substrate, and the at least one red LED, at least one green LED and at least one blue LED are all electrically connected to the thin film transistor layer.

7. The display panel according to claim 5, characterized in that: Also includes: A plurality of light shielding units are arranged on a surface of the substrate close to the light emitting layer and correspond to the first gaps one by one.

8. A method for preparing a regulating structure, characterized in that: The following steps are involved: Providing a first transparent substrate; Preparing a sealant on the first transparent substrate, wherein the sealant and the first transparent substrate form a receiving cavity; Adding a transparent liquid into the receiving chamber; Adding black photosensitive particles into the transparent liquid, wherein the black photosensitive particles include a substrate and a modified layer surrounding the substrate; the modified layer material includes a chemical substance with photocatalytic properties; the black photosensitive particles are not irradiated by light, the black photosensitive particles are evenly distributed in the transparent liquid, and when the black photosensitive particles are irradiated by light, they move in the transparent liquid to avoid light; and A second transparent substrate is arranged on a side of the frame glue away from the first transparent substrate.

9. The method for preparing the regulating structure according to claim 8, characterized in that: The material of the first transparent substrate and the second transparent substrate includes PET resin, and the material of the transparent liquid includes PVA resin.

10. The method for preparing the regulating structure according to claim 8, characterized in that: The material of the substrate includes black carbon powder or graphite; the material of the modified layer includes bismuth iodide oxide.

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