A display panel and a manufacturing method thereof, and a display device

Abstract

The present invention provides a display panel, a method for manufacturing the same, and a display device. The display panel includes a substrate, light emitting diodes of different colors arranged on the substrate, and a light scattering structure located on a side of the light emitting diode away from the substrate, and the light scattering structure covers the light emitting diode and can scatter the light emitted by the light emitting diode. By arranging the light scattering structure, the display panel can improve the problem of inconsistent brightness distribution of light emitting diodes of different colors in the viewing angle space, thereby improving the color deviation phenomenon of the viewing angle of the display panel, and further improving the display effect of the display panel.

Description

Technical Field

[0001] The present invention belongs to the field of display technology, and in particular relates to a display panel and a preparation method thereof, and a display device. Background Art

[0002] In the LED (light-emitting diode) display industry, as the application of display products with tiny pitches between LEDs becomes increasingly sophisticated and widespread, Mini / Micro LED (mini / micro light-emitting diode) display, as an upgrade of small pitch display technology, has become a new generation of display technology and is developing extremely rapidly. Mini / Micro LED and conventional LED display products are increasingly used in industrial design, high-end commercial display, smart control room, high-definition studio, education and medical screen, home theater, high-end retail store and other industry displays. With the continuous maturity of 5G and Internet of Things technologies, all walks of life will have higher and higher requirements for LED display products.

[0003] At present, Mini / Micro RGB LED (i.e., mini / micro red, green, and blue light-emitting diode chips) have the problem of inconsistent brightness distribution in viewing angle space when displaying due to their own preparation process, structure, and materials. That is, the light patterns of the red, green, and blue light-emitting diode chips are not uniform. As a result, when displaying a white picture, due to the change in the ratio of the light brightness of the red, green, and blue light-emitting diode chips at different spatial angles, the colors viewed from the front and side angles will be inconsistent. That is, Mini / Micro LED display products have a visual color bias phenomenon when displaying. Summary of the invention

[0004] The present invention aims at solving the above problems and provides a display panel and a method for manufacturing the same, as well as a display device. The display panel can improve the problem of inconsistent brightness distribution of light-emitting diodes of different colors in viewing angle space by setting a light dispersion structure, thereby improving the color deviation phenomenon of the viewing angle of the display panel and further improving the display effect of the display panel.

[0005] The present invention provides a display panel, including a substrate, light emitting diodes of different colors arranged on the substrate, and a light scattering structure located on a side of the light emitting diode away from the substrate. The light scattering structure covers the light emitting diode and can scatter the light emitted by the light emitting diode.

[0006] Optionally, the light scattering structure comprises a matrix and scattering particles, and the scattering particles are dispersed in the matrix;

[0007] The substrate is light-transmissive;

[0008] The scattering particles are capable of scattering and reflecting the light irradiated thereon;

[0009] And / or, the scattering particles are capable of scattering and transmitting light irradiated thereon.

[0010] Optionally, the substrate is made of optically transparent adhesive material;

[0011] The scattering particles are nanometer or micrometer-sized magnesium oxide particles;

[0012] And / or, the scattering particles are nanometer or micrometer-sized titanium dioxide particles;

[0013] And / or, the scattering particles are nanometer or micrometer-sized silicon dioxide particles.

[0014] Optionally, the thickness of the substrate ranges from 10 to 200 μm.

[0015] Optionally, the mass percentage of the scattering particles in the matrix is ​​in a range of 0.1% to 20%.

[0016] Optionally, the orthographic projection shape of the base body on the substrate includes a circle, an ellipse, a rectangle or a square;

[0017] The edge profile of the base body along the cross section perpendicular to the substrate is in an arc shape or a rectangular frame shape close to the side opening of the substrate.

[0018] Optionally, the light emitting diodes include a plurality of red light emitting diodes, a plurality of green light emitting diodes and a plurality of blue light emitting diodes, and the plurality of red light emitting diodes, the plurality of green light emitting diodes and the plurality of blue light emitting diodes are arranged in an array;

[0019] There are multiple light scattering structures, and the multiple light scattering structures are distributed one-to-one correspondingly with multiple light emitting diodes of different colors; and any two adjacent light scattering structures are spaced apart from each other;

[0020] Alternatively, any two adjacent light scattering structures are connected to each other.

[0021] Optionally, the mass percentage of the scattering particles in the matrix in the light scattering structure corresponding to the red LED is greater than the mass percentage of the scattering particles in the matrix in the light scattering structure corresponding to the green LED and the blue LED.

[0022] Optionally, the thickness of the substrate in the light scattering structure corresponding to the red LED is greater than or equal to the thickness of the substrate in the light scattering structure corresponding to the green LED and the blue LED.

[0023] Optionally, the shape of the matrix in the light scattering structure corresponding to the red LED is different from the shape of the matrix in the light scattering structure corresponding to the green LED and the blue LED.

[0024] Optionally, it further comprises a reflection suppression layer and a protective layer; the reflection suppression layer and the protective layer are arranged on a side of the light scattering structure away from the light emitting diode, and the reflection suppression layer and the protective layer are sequentially distributed away from the light scattering structure;

[0025] The light transmittance of the reflection suppression layer is in the range of 1% to 10%, and the reflection suppression layer can suppress the reflection of the light irradiated thereon.

[0026] Optionally, a surface of the reflection suppression layer on one side close to the light scattering structure is matched in shape to a surface of the light scattering structure on one side away from the substrate; a surface of the reflection suppression layer on one side away from the light scattering structure is a plane;

[0027] A thickness of a portion of the reflection suppression layer in contact with the substrate is greater than a thickness of a portion of the reflection suppression layer in contact with the light dispersion structure.

[0028] Optionally, the shape of the reflection suppression layer is adapted to the shape of a surface of the light scattering structure that is away from the substrate;

[0029] The reflection suppression layer has a uniform thickness.

[0030] Optionally, a transparent adhesive layer is further included, located between the reflection suppression layer and the light dispersion structure, wherein a surface of the reflection suppression layer close to the transparent adhesive layer and a surface of the reflection suppression layer away from the transparent adhesive layer are both planes, and the thickness of the reflection suppression layer is uniform.

[0031] Optionally, the reflection suppression layer is made of an optically transparent adhesive material added with carbon black;

[0032] The protective layer is made of PET, PI or PC material.

[0033] The present invention also provides a display device, comprising the above display panel.

[0034] The present invention also provides a method for preparing the above display panel, comprising: transferring the prepared light-emitting diodes of different colors to a substrate;

[0035] The light scattering structure is prepared on the substrate after the above steps by using an inkjet printing process.

[0036] Beneficial effects of the present invention: In the display panel provided by the present invention, the light emitted by the light emitting diodes of different colors passes through the light scattering structure, and the light originally propagating in a certain direction is irradiated on the light scattering structure. Due to the scattering effect of the light scattering structure on the light, the propagation direction of the light is deflected, thereby changing the original propagation direction of the light; the light is scattered by the light scattering structure, which can make the original light type distribution curve tend to the light type distribution of Lambertian scattering, so that the light type with inconsistent viewing angle space brightness distribution of the light emitting diodes of different colors is tended to the light type of Lambertian scattering after being scattered by the light scattering structure, thereby greatly improving the problem of inconsistent viewing angle space brightness distribution of light emitting diodes of different colors, and finally improving the visual color color deviation phenomenon of the display panel, and improving the display effect of the display panel.

[0037] The display device provided by the present invention improves the color deviation phenomenon of the viewing angle of the display device and enhances the display effect of the display device by adopting the above-mentioned display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of Mini LED display screen film in the public technology;

[0039] Figure 2 for Figure 1 Light profile curves of red, green and blue LEDs in Mini LED displays;

[0040] Figure 3 It is a schematic cross-sectional view of the structure of a display panel in an embodiment of the present invention;

[0041] Figure 4a for Figure 3 The schematic diagram of the structure of the display panel is shown in the top view;

[0042] Figure 4b is a schematic cross-sectional view of the structure of another display panel according to an embodiment of the present invention;

[0043] Figure 4c for Figure 4b The schematic diagram of the structure of the display panel is shown in the top view;

[0044] Figure 5 To Figure 4b and Figure 1 A schematic diagram of a visual angle deviation curve obtained by performing a simulation test on a display panel in FIG.

[0045] Figure 6a is a schematic cross-sectional view of the structure of yet another display panel in an embodiment of the present invention;

[0046] Figure 6b To Figure 6a and Figure 1A schematic diagram of a visual angle deviation curve obtained by performing a simulation test on a display panel in FIG.

[0047] Figure 7 is a schematic cross-sectional view of the structure of yet another display panel in an embodiment of the present invention;

[0048] Figure 8 is a schematic cross-sectional view of the structure of yet another display panel in an embodiment of the present invention;

[0049] Fig. 9 is a schematic cross-sectional view of the structure of yet another display panel in an embodiment of the present invention;

[0050] Fig.10 Schematic diagram of a method for preparing a display panel in an embodiment of the present invention.

[0051] The accompanying drawings are denoted as follows:

[0052] 1. Substrate; 2. Light-emitting diode; 21. Red light-emitting diode; 22. Green light-emitting diode; 23. Blue light-emitting diode; 3. Light dispersion structure; 31. Matrix; 32. Scattering particles; 4. Reflection suppression layer; 5. Protective layer; 6. Transparent adhesive layer; 7. Black film; 8. Protective adhesive. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the technical solution of the present invention, a display panel and a manufacturing method thereof and a display device of the present invention are further described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] Mini LED (mini light emitting diode) is defined as: LED devices with chip sizes between 50 and 200μm; Micro LED (micro light emitting diode) is defined as: LED devices with chip sizes below 50μm.

[0055] In the public technology, such as Figure 1 As shown in FIG. 1 , it is a schematic diagram of film attachment of a Mini LED display screen. After die bonding, a Mini LED substrate 1 is attached with a black film 7 and a protective adhesive 8 to form a display screen. Due to the preparation process of the mini red, green, and blue (RGB) light-emitting diode (21, 22, 23) chip itself and its own structure and material, there will be a problem of inconsistent brightness distribution in the viewing angle space during display, that is, the light-emitting light pattern of the red, green, and blue light-emitting diode (21, 22, 23) chip is not uniform; Figure 2As shown, the light patterns of the red LED 21 chip and the green-blue LED (22, 23) chips are quite different, which results in the color inconsistency between the front and side viewing angles when displaying a white image due to the change in the ratio of the light luminance of the red, green, and blue LED (21, 22, 23) chips at different spatial angles. For example, after correction, the image is white when viewed from the front, but red or blue may appear when viewed from a larger side, resulting in a serious color deviation.

[0056] In view of the problem of color deviation of the Mini / Micro LED display screen due to inconsistent brightness distribution in the viewing angle space, an embodiment of the present invention provides a display panel, such as Figure 3 As shown, it includes a substrate 1, light-emitting diodes 2 of different colors arranged on the substrate 1, and a light scattering structure 3 located on the side of the light-emitting diode 2 away from the substrate 1, and the light scattering structure 3 covers the light-emitting diode 2 and can scatter the light emitted by the light-emitting diode 2.

[0057] The light emitting diode 2 may be a Mini LED or a Micro LED.

[0058] In this embodiment, the light scattering structure 3 includes a matrix 31 and scattering particles 32, wherein the scattering particles 32 are dispersed in the matrix 31; the matrix 31 is light-transmissive; and the scattering particles 32 are capable of scattering and reflecting the light irradiated thereon.

[0059] Optionally, the substrate 31 is made of an optically transparent adhesive material; the scattering particles 32 are made of nanometer or micrometer-sized magnesium oxide particles; and / or the scattering particles 32 are made of nanometer or micrometer-sized titanium dioxide particles.

[0060] Optionally, the scattering particles 32 may also be capable of scattering and transmitting the light irradiated thereon. For example, the scattering particles 32 may also be nanometer or micrometer-sized silica particles. It should be noted that if the scattering particles 32 can scatter and transmit the light, the refractive index of the scattering particles 32 cannot be the same as the refractive index of the matrix 31, so as to ensure that the scattering particles 32 dispersed in the matrix 31 can normally scatter the light irradiated thereon.

[0061] In this embodiment, the light emitted by the light emitting diode 2 will change the original light type distribution curve of the light emitting diode 2 after passing through the scattering particles 32 in the matrix 31. The light type distribution curve refers to the brightness distribution of the light emitted by the light emitting diode 2 in space. Specifically, the light emitted by the light emitting diodes 2 of different colors passes through the scattering particles 32 in the matrix 31, and the light originally propagating in a certain direction is irradiated on the diffusion particles 32. Due to the scattering effect of the diffusion particles 32 on the light, the propagation direction of the light is deflected, thereby changing the original propagation direction of the light; the light is scattered by a large number of scattering particles 32, which can make the original light type distribution curve tend to the light type distribution of Lambertian scattering, so that the light type with inconsistent brightness distribution in the viewing angle space of the light emitting diodes 2 of different colors will tend to the light type of Lambertian scattering after being scattered by a large number of scattering particles 32, thereby greatly improving the problem of inconsistent brightness distribution in the viewing angle space of the light emitting diodes 2 of different colors, and finally improving the color deviation phenomenon of the visual angle of the display panel.

[0062] Optionally, the thickness of the matrix 31 ranges from 10 to 200 μm. Optionally, the mass percentage of the scattering particles 32 in the matrix 31 ranges from 0.1% to 20%. Among them, the matrix 31 covering the light-emitting diode 2 is designed to be of equal thickness. Of course, the matrix 31 covering the light-emitting diode 2 can also be designed to be of unequal thickness. Such a setting can ensure to a certain extent that the light type with inconsistent visual angle spatial brightness distribution of the original light-emitting diode 2 tends to be a light type scattered by a Lambertian body after being scattered by a large number of scattering particles 32, thereby greatly improving the problem of inconsistent visual angle spatial brightness distribution of the light-emitting diode 2.

[0063] Optionally, in this embodiment, the orthographic projection shape of the base 31 on the substrate 1 includes a circle, an ellipse, a rectangle or a square; the edge contour of the base 31 along the cross section perpendicular to the substrate 1 is an arc shape or a rectangular frame shape close to the side opening of the substrate 1. Figure 4a and Figure 3 As shown, the orthographic projection shape of the base 31 on the substrate 1 is circular, and the edge profile of the base 31 along the cross section perpendicular to the substrate 1 is semicircular; Figure 4b and Figure 4c As shown, the orthographic projection shape of the base 31 on the substrate 1 is a rectangle, and the edge contour of the base 31 along the cross section perpendicular to the substrate 1 is a rectangular frame shape close to the side opening of the substrate 1.

[0064] like Figure 5 , Figure 4b and Figure 1As shown, in order to illustrate the effectiveness of improving the color deviation of the display panel by setting the light scattering structure 3 in this embodiment, a scattering particle 32 is used as an example for simulation test. In the simulation test, the scattering particle 32 is made of magnesium oxide, the particle size of the scattering particle 32 is 200nm, and the mass percentage of the scattering particle 32 dispersed in the matrix 31 is 3% and 10% respectively. The orthographic projection shape of the matrix 31 covering the light emitting diode 2 on the substrate 1 is a rectangle, and the edge profile of the matrix 31 along the cross section perpendicular to the substrate 1 is a rectangular frame shape close to the opening on the side of the substrate 1. The thickness of the matrix 31 is set to 60μm. Figure 5 For simulation Figure 4b The mass percentages of the scattering particles 32 in the matrix 31 in the display panel are 3%, 10% and Figure 1 The corresponding color deviation curves of the display panels in the figure. Among them, the color deviation curve of the display panel indicates the difference in display color between the normal viewing angle and other viewing angles. The larger the color deviation value of the display panel, the greater the color deviation difference. By comparing the color deviation curves of the display panel, it can be found that after adding the magnesium oxide scattering particles 32, the color deviation of the display panel decreases at all viewing angles. The mass percentage of the scattering particles 32 in the matrix 31 is 10%, which further reduces the color deviation of the display panel compared with the mass percentage of 3%. This shows that the color deviation of the display panel is significantly improved after the addition of the scattering particles 32, and as the mass percentage of the scattering particles 32 in the matrix 31 increases, the improvement effect of the color deviation is more obvious.

[0065] Alternatively, if Figure 3-4c As shown, the light-emitting diode 2 includes a plurality of red light-emitting diodes 21, a plurality of green light-emitting diodes 22 and a plurality of blue light-emitting diodes 23, and the plurality of red light-emitting diodes 21, the plurality of green light-emitting diodes 22 and the plurality of blue light-emitting diodes 23 are arranged in an array; the number of the light-emitting dispersion structures 3 is multiple, and the plurality of light-emitting dispersion structures 3 are distributed in a one-to-one correspondence with the plurality of light-emitting diodes 2 of different colors; and any two adjacent light-emitting dispersion structures 3 are spaced from each other. Among them, the light emitted by the red, green and blue light emitting diodes 2 passes through the scattering particles 32 in the matrix 31, and the light originally propagating in a certain direction is irradiated on the diffusion particles 32. Due to the scattering effect of the diffusion particles 32 on the light, the propagation direction of the light is deflected, thereby changing the original propagation direction of the light; the light is scattered by a large number of scattering particles 32, which can make the original light type distribution curve tend to the light type distribution of Lambertian scattering, so that the light type with inconsistent viewing angle space brightness distribution of the original red, green and blue light emitting diodes 2 tends to the light type of Lambertian scattering after being scattered by a large number of scattering particles 32, thereby greatly improving the problem of inconsistent viewing angle space brightness distribution of the red, green and blue light emitting diodes 2, and finally improving the color deviation phenomenon of the display panel.

[0066] Optionally, the mass percentage of the scattering particles 32 in the matrix 31 in the light scattering structure 3 corresponding to the red LED 21 is greater than the mass percentage of the scattering particles 32 in the matrix 31 in the light scattering structure 3 corresponding to the green LED 22 and the blue LED 23 .

[0067] Optionally, the thickness of the matrix 31 in the light scattering structure 3 corresponding to the red LED 21 is greater than or equal to the thickness of the matrix 31 in the light scattering structure 3 corresponding to the green LED 22 and the blue LED 23 .

[0068] Optionally, the shape of the matrix 31 in the light scattering structure 3 corresponding to encapsulating the red LED 21 is different from the shape of the matrix 31 in the light scattering structure 3 corresponding to encapsulating the green LED 22 and the blue LED 23 .

[0069] Among them, refer to Figure 2 Due to the manufacturing process, the light distribution curves of the green LED 22 and the blue LED 23 are basically the same, but the light distribution curve of the red LED 21 is quite different from the light distribution curves of the green and blue LEDs. Therefore, by performing differentiated design on the substrate 31 covering the red LED 21 and the substrate 31 covering the green LED 22 and the blue LED 23, such as differentially designing the type of scattering particles 32 in the substrate 31 of the red LED 21 and the green LED 22 and the blue LED 23, the doping mass percentage, the thickness of the substrate 31, and the shape of the substrate 31, the light distribution curve of the red LED 21 can be better made consistent with the light distribution curve of the green LED 22 and the blue LED 23, thereby better improving the color deviation phenomenon of the viewing angle of the display panel.

[0070] like Figure 6a , Figure 6b and Figure 1As shown, in order to illustrate that the light scattering structures 3 corresponding to different color LEDs 2 can be set differently in this embodiment to better improve the color deviation of the display panel, a scattering particle 32 is used as an example for simulation test. In the simulation test, the scattering particle 32 is made of magnesium oxide, and the particle size of the scattering particle 32 is 200nm. The mass percentage of the scattering particles 32 dispersed in the matrix 31 in the light scattering structure 3 covering the red LED 21 is 5%, and the mass percentage of the scattering particles 32 dispersed in the matrix 31 in the light scattering structure 3 covering the green LED 22 and the blue LED 23 is 3%. The orthographic projection shape of the matrix 31 covering the red LED 21 on the substrate 1 is circular, and the edge contour of the matrix 31 along the cross section perpendicular to the substrate 1 is a semicircular arc line; the orthographic projection shape of the matrix 31 covering the green LED 22 and the blue LED 23 on the substrate 1 is a rectangle, and the edge contour of the matrix 31 along the cross section perpendicular to the substrate 1 is a rectangular frame shape close to the opening on the side of the substrate 1; the thickness of the matrix 31 is set to 60μm, Figure 6b For simulation Figure 6a and Figure 1 The visual color deviation curve obtained by the display panel in. Among them, the visual color deviation curve represents the display color difference between the display panel at the normal viewing angle and other viewing angles. The larger the visual color deviation value, the greater the color deviation difference. By comparing the visual color deviation curves, it can be found that after adding the magnesium oxide scattering particles 32, the visual color deviation of the display panel decreases at all viewing angles. The shape of the substrate 31 covering the red light-emitting diode 21 and the shape of the substrate 31 covering the green light-emitting diode 22 and the blue light-emitting diode 23 are differentiated, which can further reduce the visual color deviation of the display panel.

[0071] In this embodiment, Figure 3 As shown, the display panel further includes a reflection suppression layer 4 and a protective layer 5; the reflection suppression layer 4 and the protective layer 5 are arranged on the side of the light scattering structure 3 away from the light emitting diode 2, and the reflection suppression layer 4 and the protective layer 5 are sequentially distributed away from the light scattering structure 3; the light transmittance of the reflection suppression layer 4 is in the range of 1% to 10%, and the reflection suppression layer 4 can suppress the reflection of the light irradiated thereon. The provision of the reflection suppression layer 4 can improve the display contrast of the display panel. The protective layer 5 mainly plays the role of protecting the light emitting side surface of the display panel.

[0072] Optionally, the reflection suppression layer 4 is made of an optically transparent adhesive material with carbon black added, and the protective layer 5 is made of PET, PI or PC. The reflection suppression layer 4 can also be made of other materials with a certain transmittance and capable of suppressing the reflection of the light irradiated thereon.

[0073] In this embodiment, Figure 3As shown, the surface of the reflection suppression layer 4 on one side close to the light scattering structure 3 is adapted to the surface of the light scattering structure 3 on one side away from the substrate 1; the surface of the reflection suppression layer 4 on the side away from the light scattering structure 3 is a plane; the thickness of the portion of the reflection suppression layer 4 in contact with the substrate 1 is greater than the thickness of the portion of the reflection suppression layer 4 in contact with the light scattering structure 3. Since any two adjacent light scattering structures 3 are spaced apart from each other, the reflection suppression layer 4 is in contact with the surface of the substrate 1 in the spaced area between any two adjacent light scattering structures 3. It can be seen that the light scattering structures 3 arranged at intervals can further increase the coverage area of ​​the reflection suppression layer 4. With such a structure of the reflection suppression layer 4, the thicker portion can better suppress the reflection of the light irradiated thereon than the thinner portion. Therefore, the reflection suppression layer 4 with such a structure has a more significant effect on improving the display contrast of the display panel.

[0074] It should be noted that if more and thicker substrates 31 are needed to ensure the improvement of the color deviation of the display panel due to the scattering particles 32 in the substrate 31 of the light scattering structure 3 or the concentration of the scattering particles 32, the substrates 31 of adjacent light scattering structures 3 can also be connected to each other, that is, any two adjacent light scattering structures are connected to each other, such as Figure 7 shown.

[0075] Alternatively, if Figure 8 As shown, the shape of the reflection suppression layer 4 can also be adapted to the shape of the surface of the light dispersing structure 3 on the side away from the substrate 1; the thickness of the reflection suppression layer 4 is uniform. The protective layer 5 fills the light-emitting side surface of the display panel. The reflection suppression layer 4 with such a structure can also well improve the display contrast of the display panel.

[0076] Alternatively, if Fig. 9 As shown, the display panel further includes a transparent adhesive layer 6, which is located between the reflection suppression layer 4 and the light dispersion structure 3. The surface of the reflection suppression layer 4 on one side close to the transparent adhesive layer 6 and the surface on the other side away from the transparent adhesive layer 6 are both planes, and the thickness of the reflection suppression layer 4 is uniform. The transparent adhesive layer 6 can be made of an optically transparent adhesive material. The reflection suppression layer 4 with such a structure can also well improve the display contrast of the display panel.

[0077] Based on the above Figure 3 , Figure 8 , Fig. 9 Different structural shapes of the reflection suppression layer 4 have different requirements on the thickness of the reflection suppression layer 4 and the concentration of the black pigment (such as carbon black) filled therein. Figure 8 and Fig. 9The reflection suppression layer 4 of the middle structure shape requires that the thickness of the reflection suppression layer 4 is less than the height of the light emitting diode 2. Regardless of the thickness of the reflection suppression layer 4 and the concentration of the black pigment (such as carbon black) filled therein, as long as its light transmittance is ensured to be within 1% to 10%, it can play a good role in suppressing the reflection of the incident light.

[0078] Based on the above structure of the display panel, this embodiment also provides a method for preparing the display panel. Fig.10 As shown, it includes: Step S01: transferring the prepared light-emitting diodes 2 of different colors to the substrate 1.

[0079] In this step, light-emitting diodes 2 of the same color are prepared at the same time, and a mass transfer is performed on the light-emitting diodes 2 of the same color to transfer them onto the substrate 1. The specific process will not be described in detail.

[0080] Step S02: using an inkjet printing process to prepare a light scattering structure 3 on the substrate 1 after the above steps are completed.

[0081] In this step, first, the scattering particles 32 are dispersed and mixed in the matrix 31 according to a certain mass percentage; then, a high-precision inkjet printing device is used, and the printing accuracy requires the line width to be at the micron level and the nozzle positioning resolution to be around 100nm, and the printing operation is performed according to the required morphology of the light scattering structure 3.

[0082] In this embodiment, Figure 3 Taking the display panel in as an example, the method for preparing the display panel also includes: step S03: preparing a reflection suppression layer 4 and a protective layer 5 on the substrate 1 after completing step S02.

[0083] In this step, the reflection suppression layer 4 can be a formed adhesive layer, which is directly attached to the substrate 1 after completing step S02, and then cured by heating to form the reflection suppression layer 4; or, the reflection suppression layer 4 can also be a glue with a certain viscosity printed on the substrate 1 after completing step S02, and then cured to form the reflection suppression layer 4. The protective layer 5 can be a formed film layer, such as a PET film, a PI film or a PC film, which is attached to the substrate 1 after the reflection suppression layer 4 is prepared.

[0084] The preparation method of the display panel prepares the light scattering structure 3 and the reflection suppression layer 4 separately, so that the light scattering structure 3 and the reflection suppression layer 4 are separately arranged in structure, thereby separating the light scattering effect of the light scattering structure 3 and the effect of the reflection suppression layer 4 on improving the display contrast of the display panel. The preparation method of the display panel is simple.

[0085] In the display panel, light emitted by light emitting diodes of different colors passes through the light scattering structure, and the light originally propagating in a certain direction is irradiated on the light scattering structure. Due to the scattering effect of the light scattering structure on the light, the propagation direction of the light is deflected, thereby changing the original propagation direction of the light; the light is scattered by the light scattering structure, which can make the original light type distribution curve tend to the light type distribution of Lambertian body scattering, so that the light type with inconsistent viewing angle space brightness distribution of light emitting diodes of different colors is tended to the light type of Lambertian body scattering after being scattered by the light scattering structure, thereby greatly improving the problem of inconsistent viewing angle space brightness distribution of light emitting diodes of different colors, and finally improving the color deviation phenomenon of the viewing angle of the display panel, and improving the display effect of the display panel.

[0086] An embodiment of the present invention further provides a display device, comprising the display panel in the above embodiment.

[0087] By adopting the display panel in the above embodiment, the color deviation phenomenon of the viewing angle of the display device is improved, and the display effect of the display device is enhanced.

[0088] The display panel provided by the present invention can be any product or component with a display function, such as a Mini LED panel, a Mini LED TV, a Micro LED panel, a Micro LED TV, a monitor, a mobile phone, a navigator, etc.

[0089] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A display panel comprising a substrate, light emitting diodes of different colors arranged on the substrate, characterized in that: It also includes a light scattering structure, which is located on a side of the light emitting diode away from the substrate, and the light scattering structure covers the light emitting diode and can scatter the light emitted by the light emitting diode; The light scattering structure comprises a matrix and scattering particles, wherein the scattering particles are dispersed in the matrix; The substrate is light-transmissive; The scattering particles are capable of scattering and reflecting the light irradiated thereon; and / or, the scattering particles are capable of scattering and transmitting light irradiated thereon; The light emitting diodes include a plurality of red light emitting diodes, a plurality of green light emitting diodes and a plurality of blue light emitting diodes, and the plurality of red light emitting diodes, the plurality of green light emitting diodes and the plurality of blue light emitting diodes are arranged in an array; There are multiple light scattering structures, and the multiple light scattering structures are distributed one-to-one correspondingly with multiple light emitting diodes of different colors; and any two adjacent light scattering structures are spaced apart from each other; Alternatively, any two adjacent light scattering structures are connected to each other; The mass percentage of the scattering particles in the matrix in the light scattering structure corresponding to the red LED is greater than the mass percentage of the scattering particles in the matrix in the light scattering structure corresponding to the green LED and the blue LED.

2. The display panel according to claim 1, characterized in that: The substrate is made of optically transparent adhesive material; The scattering particles are nanometer or micrometer-sized magnesium oxide particles; And / or, the scattering particles are nanometer or micrometer-sized titanium dioxide particles; And / or, the scattering particles are nanometer or micrometer-sized silicon dioxide particles.

3. The display panel according to claim 2, characterized in that: The thickness of the substrate ranges from 10 to 200 μm.

4. The display panel according to claim 2, characterized in that: The mass percentage of the scattering particles in the matrix is ​​in the range of 0.1% to 20%.

5. The display panel according to claim 2, characterized in that: The orthographic projection shape of the base body on the substrate includes a circle, an ellipse, a rectangle or a square; The edge profile of the base body along the cross section perpendicular to the substrate is in an arc shape or a rectangular frame shape close to the side opening of the substrate.

6. The display panel according to claim 1, characterized in that: The thickness of the substrate in the light scattering structure corresponding to the red LED is greater than or equal to the thickness of the substrate in the light scattering structure corresponding to the green LED and the blue LED.

7. The display panel according to claim 6, characterized in that: The shape of the substrate in the light scattering structure corresponding to the red LED is different from the shape of the substrate in the light scattering structure corresponding to the green LED and the blue LED.

8. The display panel according to any one of claims 1 to 7, characterized in that: It also includes a reflection suppression layer and a protective layer; the reflection suppression layer and the protective layer are arranged on a side of the light scattering structure away from the light emitting diode, and the reflection suppression layer and the protective layer are sequentially distributed away from the light scattering structure; The light transmittance of the reflection suppression layer is in the range of 1% to 10%, and the reflection suppression layer can suppress the reflection of the light irradiated thereon.

9. The display panel according to claim 8, characterized in that: The surface of the reflection suppression layer on one side close to the light scattering structure is adapted to the shape of the surface of the light scattering structure on one side away from the substrate; the surface of the reflection suppression layer on one side away from the light scattering structure is a plane; A thickness of a portion of the reflection suppression layer in contact with the substrate is greater than a thickness of a portion of the reflection suppression layer in contact with the light dispersion structure.

10. The display panel according to claim 8, characterized in that: The shape of the reflection suppression layer is adapted to the shape of the surface of the light scattering structure on the side facing away from the substrate; The reflection suppression layer has a uniform thickness.

11. The display panel according to claim 8, characterized in that: It also includes a transparent adhesive layer located between the reflection suppression layer and the light dispersion structure. The surface of the reflection suppression layer close to the transparent adhesive layer and the surface of the reflection suppression layer away from the transparent adhesive layer are both flat, and the thickness of the reflection suppression layer is uniform.

12. The display panel according to claim 8, characterized in that: The reflection suppression layer is made of an optically transparent adhesive material added with carbon black; The protective layer is made of PET, PI or PC material.

13. A display device, characterized in that: A display panel comprising any one of claims 1-12.

14. A method for preparing a display panel according to any one of claims 1 to 12, characterized in that: include: transferring the prepared light-emitting diodes of different colors to a substrate; The light scattering structure is prepared on the substrate after the above steps by using an inkjet printing process.

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