MLED display panel and preparation method thereof

Abstract

The invention provides an MLED display panel and a preparation method thereof, the MLED display panel comprises a blue light lamp panel, a quantum dot composite film, a light filtering layer, a light shielding layer and a light emitting protection layer, the blue light lamp panel comprises a substrate and a plurality of blue light chips arranged on the substrate; the quantum dot composite film is arranged on the light emitting side of the blue light lamp panel and comprises a plurality of quantum dot film layers and a first reflecting layer located between every two adjacent quantum dot film layers, and the quantum dot film layers comprise the red quantum dot film layer, the green quantum dot film layer and the blue quantum dot film layer; the light filtering layer and the light shielding layer are both arranged on the quantum dot composite film, the light filtering layer comprises a plurality of light filters which are in one-to-one corresponding contact with the quantum dot film layers, and the light filters and the quantum dot film layers which are in contact with each other have the same color; the shading layer is located between two adjacent optical filters; the light emitting protection layer is arranged on the light filtering layer and the light shielding layer. The problems that the chip transfer efficiency of an existing MLED display is poor, color cast is easily caused, and the color saturation is reduced are solved.

Description

Technical Field

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

[0002] At present, most common MLED displays on the market use red light-emitting chips, green light-emitting chips and blue light-emitting chips to mix to form white light. This requires transferring the light-emitting chips three times, which not only reduces the transfer efficiency but also affects the transfer accuracy, easily causing adverse effects on the display effect. In addition, the red light-emitting chips, green light-emitting chips and blue light-emitting chips are spaced apart from each other, and are prone to interfere with each other when emitting light, causing color deviation, thereby reducing the color saturation of the display. Summary of the invention

[0003] The embodiment of the present application provides an MLED display panel and a preparation method thereof. By combining a blue light panel and a quantum dot composite film, only the blue light chip needs to be transferred, and the blue light is converted into the required light wavelength through the quantum dot film layer, thereby solving the problem of poor chip transfer efficiency of existing MLED displays and easy color deviation and reduced color saturation.

[0004] The present invention is implemented as follows: an MLED display panel includes a blue light board, a quantum dot composite film, a filter layer, a shading layer and a light output protection layer, wherein the blue light board includes a substrate and a plurality of blue light chips arranged on the substrate; the quantum dot composite film is arranged on the light-emitting side of the blue light board, the quantum dot composite film includes a plurality of quantum dot film layers and a first reflection layer located between two adjacent quantum dot films, the plurality of quantum dot film layers include a red quantum dot film layer, a green quantum dot film layer and a blue quantum dot film layer; the filter layer is arranged on the quantum dot composite film, the filter layer includes a plurality of filters, the plurality of filters are in one-to-one contact with the plurality of quantum dot film layers, and the colors of the filters and quantum dot film layers in contact with each other are the same; the shading layer is arranged on the quantum dot composite film and is located between two adjacent filters; the light output protection layer is arranged on the filter layer and the shading layer.

[0005] In one of the embodiments, the orthographic projection of the blue light chip on the substrate is located within the orthographic projection of the quantum dot film layer on the substrate.

[0006] In one of the embodiments, an optical path adhesive is provided on the light emitting surface of the blue light chip, and the optical path adhesive completely covers the light emitting surface of the blue light chip.

[0007] In one of the embodiments, a first packaging layer is provided at a position on the surface of the substrate between two adjacent blue light chips;

[0008] A second reflective layer is disposed on the first packaging layer.

[0009] In one of the embodiments, a surface of the quantum dot film layer close to the blue light chip is in contact with the second reflective layer and the optical path adhesive respectively.

[0010] In one embodiment, the second reflective layer covers the first packaging layer and the optical path adhesive, and a surface of the second reflective layer on a side away from the blue light chip is parallel to the substrate;

[0011] The quantum dot composite film is arranged on a surface of the second reflective layer on a side away from the blue light chip.

[0012] In one of the embodiments, a third reflective layer is provided between the mutually adjacent light-shielding layer and the color filter, and the third reflective layer is in contact with the light-shielding layer and the color filter respectively.

[0013] In one embodiment, the light output protection layer includes a second packaging layer and an optical film, the second packaging layer is arranged on the filter layer and the light shielding layer, and the optical film is arranged on the second packaging layer.

[0014] The beneficial effect of the MLED display panel provided by the present application is that: compared with the prior art, the present application arranges a quantum dot composite film on the light-emitting side of the blue light panel, and arranges a filter of a corresponding color on each quantum dot film layer, and arranges a shading layer between adjacent filters, so that when making the MLED display panel, only the blue light chip needs to be transferred, and only one transfer is required, which greatly improves the transfer efficiency and the transfer accuracy; and the blue light emitted by the blue light chip is converted into the wavelength required by the corresponding color light through quantum dot film layers of different colors, so that the color of the emitted light is purer, and the half-wave peak width of the peak of the required wavelength is smaller, thereby improving the color gamut range and color saturation of the MLED display panel.

[0015] The embodiment of the present application further provides a method for preparing an MLED display panel, which is used to prepare the MLED display panel as described in the above embodiment, comprising:

[0016] Manufacturing a blue light panel, the blue light panel comprising a substrate and a plurality of blue light chips disposed on the substrate;

[0017] forming a first encapsulation layer on the substrate, and forming a second reflective layer on the first encapsulation layer;

[0018] forming an optical path adhesive on the light emitting surface of the blue light chip;

[0019] Producing a quantum dot composite film, wherein the quantum dot composite film comprises a plurality of quantum dot film layers and a first reflective layer located between two adjacent quantum dot film layers;

[0020] The quantum dot composite film is arranged on the light-emitting side of the blue light panel, so that a surface of each quantum dot film layer close to the blue light chip is respectively in contact with the second reflective layer and the optical path adhesive of a corresponding light-emitting surface of the blue light chip;

[0021] Forming a filter layer on the quantum dot composite film, wherein the filter layer includes a plurality of filters that are in one-to-one contact with the plurality of quantum dot film layers, and the filters and quantum dot film layers that are in contact with each other have the same color;

[0022] Forming a light shielding layer on the quantum dot composite film, which is the same layer as the filter layer, wherein the light shielding layer is located between two adjacent filters;

[0023] A light protection layer is prepared on the filter layer and the light shielding layer.

[0024] The embodiment of the present application further provides a method for preparing an MLED display panel, which is used to prepare the MLED display panel as described in the above embodiment, comprising:

[0025] Manufacturing a blue light panel, the blue light panel comprising a substrate and a plurality of blue light chips disposed on the substrate;

[0026] forming an optical path adhesive on the light emitting surface of the blue light chip;

[0027] forming a first packaging layer on the substrate, and forming a second reflection layer on the first packaging layer, so that the second reflection layer covers the first packaging layer and the optical path adhesive;

[0028] Producing a quantum dot composite film, wherein the quantum dot composite film comprises a plurality of quantum dot film layers and a first reflective layer located between two adjacent quantum dot film layers;

[0029] Disposing the quantum dot composite film on the second reflective layer;

[0030] Forming a filter layer on the quantum dot composite film, wherein the filter layer includes a plurality of filters that are in one-to-one contact with the plurality of quantum dot film layers, and the filters and quantum dot film layers that are in contact with each other have the same color;

[0031] Forming a light shielding layer on the quantum dot composite film, which is the same layer as the filter layer, wherein the light shielding layer is located between two adjacent filters;

[0032] A light protection layer is prepared on the filter layer and the light shielding layer.

[0033] The beneficial effect of the preparation method of the MLED display panel provided in the present application is that: for preparing the above-mentioned MLED display panel, the present application sets a quantum dot composite film on the light-emitting side of the blue light board, and sets a filter of the corresponding color on each quantum dot film layer, and sets a shading layer between adjacent filters, so that when making the MLED display panel, only the blue light chip needs to be transferred, and only one transfer is required, which greatly improves the transfer efficiency and improves the transfer accuracy; and the blue light emitted by the blue light chip is converted into the wavelength required by the corresponding color light through quantum dot film layers of different colors, so that the color of the emitted light is purer, and the half-wave peak width of the peak of the required wavelength is smaller, thereby improving the color gamut range and color saturation of the MLED display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a structural schematic diagram of the MLED display panel provided in Example 1 of the present application;

[0035] Figure 2 This is a schematic diagram of light emitted by a blue light chip of an MLED display panel provided in Example 1 of the present application;

[0036] Figure 3 It is a schematic diagram of the structure of the quantum dot composite film of the MLED display panel provided in Example 1 of the present application;

[0037] Figure 4 is a schematic structural diagram of an optical film of an MLED display panel provided in Example 1 of the present application;

[0038] Figure 5 This is a schematic diagram of local light emission of the MLED display panel provided in Example 1 of the present application;

[0039] Figure 6 is a schematic diagram of the structure of the MLED display panel provided in Example 2 of the present application;

[0040] Figure 7 It is a schematic flow chart of a method for preparing an MLED display panel provided in Example 3 of the present application;

[0041] Figure 8 yes Figure 7 A specific implementation flow chart of step S101;

[0042] Figure 9-1 Yes Complete Figure 8 Device structure diagram of step S1011;

[0043] Figure 9-2 Yes Complete Figure 8 Device structure diagram of step S1012;

[0044] Figure 9-3 Yes Complete Figure 8 Device structure diagram of step S1013;

[0045] Figure 9-4 Yes Complete Figure 8 Device structure diagram of step S1014;

[0046] Figure 9-5 Yes Complete Figure 8 Device structure diagram of step S1015;

[0047] Figure 9-6 Yes Complete Figure 8 Device structure diagram of step S1016;

[0048] Fig.10 It is a flow chart of the method for preparing the MLED display panel provided in the fourth embodiment of the present application.

[0049] Reference numerals: 1, blue light board; 11, substrate; 111, binding area; 112, pad; 12, blue light chip; 120, optical path glue; 13, first packaging layer; 14, second reflection layer;

[0050] 2. Quantum dot composite film; 21. Quantum dot film layer; 22. First reflective layer; 3. Filter; 4. Shading layer; 5. Light output protection layer; 51. Second encapsulation layer; 52. Optical film; 521. AF; 522. AG; 523. Optical functional layer; 524. PET substrate; 525. Adhesive; 6. Third reflective layer; 7. Growth substrate; 8. Transfer substrate. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0052] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0053] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] It should also be noted that, in the embodiments of the present application, the same figure mark is used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0056] The embodiments of the present application provide an MLED display panel and a method for preparing the same, which solve the problems of poor chip transfer efficiency and easy color shift and reduced color saturation in existing MLED displays.

[0057] Embodiment 1

[0058] refer to Figure 1 The MLED display panel provided in the first embodiment of the present application includes a blue light board 1, a quantum dot composite film 2, a filter layer, a shading layer 4 and a light output protection layer 5. The blue light board 1 includes a substrate 11 and a plurality of blue light chips 12 arranged on the substrate 11; the quantum dot composite film 2 is arranged on the light-emitting side of the blue light board 1, the quantum dot composite film 2 includes a plurality of quantum dot film layers 21 and a first reflection layer 22 located between two adjacent quantum dot films, the plurality of quantum dot film layers 21 include a red quantum dot film layer 21, a green quantum dot film layer 21 and a blue quantum dot film layer 21; the filter layer is arranged on the quantum dot composite film 2, the filter layer includes a plurality of filters 3, the plurality of filters 3 are in one-to-one contact with the plurality of quantum dot film layers 21, and the colors of the filters 3 and quantum dot film layers 21 in contact with each other are the same; the shading layer 4 is arranged on the quantum dot composite film 2 and is located between two adjacent filters 3; the light output protection layer 5 is arranged on the filter layer and the shading layer 4.

[0059] Among them, the blue light board 1 is a light board formed by arranging multiple blue light chips 12 on a substrate 11. The substrate 11 is composed of a glass plate, a PCB circuit board, etc. Specifically, the glass plate can be etched first, the circuit can be embedded and the circuit can be laid out. A solder pad 112 is reserved at the position where the blue light chip 12 needs to be set, and a solder pad 112 is also required at the position where the control chip is set, so that the blue light chip 12 and the control chip can be electrically connected to the PCB circuit board after being set on the substrate 11 to realize the lighting function and the control function.

[0060] The basic principle of quantum dot display technology is that blue light LEDs emit blue light. When the blue light passes through quantum dot film, part of the blue light is converted into green and red light by quantum dots. The unconverted blue light and the green and red light emitted by quantum dots together form white light, which becomes the light source of the display. As a new nanomaterial with unique optical properties, quantum dot film can accurately and efficiently convert high-energy blue light into red and green light, and can emit full-spectrum light when illuminated by blue LEDs.

[0061] It should be noted that the embodiment of the present application is provided with a blue light board 1, and the blue light emitted by the blue light chip 12 is converted by the quantum dot film layer 21 to produce the required wavelengths of red light, green light and blue light, so as to achieve a good light mixing effect. Based on this, when manufacturing the MLED display panel, it is only necessary to transfer the blue light chip 12 to the substrate 11. Compared with the prior art, which requires the red light-emitting chip, the green light-emitting chip and the blue light-emitting chip to be transferred to the substrate 11 separately, the transfer process of the present application is significantly reduced, which can not only improve the efficiency of chip transfer, but also only one chip can ensure that the arrangement position of the chip after transfer is more accurate, will not affect the display effect, and the cost of chip transfer can also be reduced.

[0062] In addition, a quantum dot composite film 2 is arranged on the light-emitting side of the blue light panel 1, and the blue light emitted by the blue light chip 12 will be converted into light of corresponding color when it is irradiated on the quantum dot film layer 21. Compared with the electroluminescence method in the prior art, this quantum dot photoluminescence method has a smaller half-wave peak width of the wavelength peak, so that the emitted light is purer and the color deviation is improved. Moreover, by changing the size of the quantum particles in the quantum dot film layer 21, the blue light can be effectively converted into red light, green light and blue light in the wavelength range we specifically need, thereby improving the color saturation of the display and enhancing the color gamut range.

[0063] refer to Figure 3The quantum dot composite film 2 includes a plurality of quantum dot film layers 21 and a first reflective layer 22 located between two adjacent quantum dot films. The plurality of quantum dot film layers 21 include a red quantum dot film layer, a green quantum dot film layer and a blue quantum dot film layer. Specifically, the red quantum dot film layer, the green quantum dot film layer and the blue quantum dot film layer are arranged in sequence, and a first reflective layer 22 is set between the red quantum dot film layer and the green quantum dot film layer, a first reflective layer 22 is set between the green quantum dot film layer and the blue quantum dot film layer, and a first reflective layer 22 is set between the blue quantum dot film layer and the red quantum dot film layer. At the same time, a quantum dot film layer 21 is covered on each blue light chip 12, so that the red quantum dot film layer converts blue light into red light of a specific required wavelength and emits it, the green quantum dot film layer converts blue light into green light of a specific required wavelength and emits it, and the blue quantum dot film layer converts blue light into blue light of a specific required wavelength and emits it, so that each color of quantum dot film layer 21 converts blue light independently, will not be affected by adjacent quantum dot film layers 21, and will not cause color deviation.

[0064] In other words, the red quantum dot film layer and the blue light chip 12 are combined to emit red light, which is equivalent to the red light-emitting chip in the prior art, the green quantum dot film layer and the blue light chip 12 are combined to emit green light, which is equivalent to the green light-emitting chip in the prior art, and the blue quantum dot film layer and the blue light chip 12 are combined to emit blue light, which is equivalent to the blue light-emitting chip in the prior art. However, the way in which the quantum dot film layer 21 and the blue light chip 12 of the present application are combined to emit light enables each color of light to be emitted in an independent channel, and there will be no color deviation problem.

[0065] The above-mentioned quantum dot composite film 2 can be integrally manufactured by injection molding, which not only improves the manufacturing efficiency of the quantum dot composite film 2, but also enables the quantum dot composite film 2 to be directly installed on the light-emitting side of the blue light board 1 when manufacturing the MLED display panel to complete the setting of the quantum dot film layer 21, thereby greatly improving the preparation efficiency of the MLED display panel.

[0066] For example, the quantum dot composite film 2 can be a rectangular parallelepiped. In the embodiment of the present application, the quantum dot film layer 21 is designed to be a trapezoid, so that the first reflective layer 22 arranged between two adjacent quantum dot film layers 21 is designed to be a triangle; of course, the quantum dot film layer 21 can also be designed to be a square column, so that the first reflective layer 22 arranged between two adjacent quantum dot film layers 21 is also designed to be a square column. The present application does not specifically limit the shapes of the quantum dot film layer 21 and the first reflective layer 22. As long as the first reflective layer 22 is arranged between two adjacent quantum dot film layers 21, the quantum dot film layer 21 can be converted into blue light without being affected by the adjacent quantum dot film layer 21, so that each color of light is emitted in an independent channel, and no color deviation is caused.

[0067] In some embodiments, reference Figure 2 The filter 3 includes a red filter, a green filter and a blue filter, and the red filter is closely attached to the surface of the red quantum dot film layer away from the blue light chip 12, the green filter is closely attached to the surface of the green quantum dot film layer away from the blue light chip 12, and the blue filter is closely attached to the surface of the blue quantum dot film layer away from the blue light chip 12. In this way, the light converted by the quantum dot film layer 21 can directly enter the filter 3 for filtering, thereby making the emitted light purer and having higher color saturation.

[0068] It should be noted that when setting, the filter 3 needs to fully cover the surface of the quantum dot film layer 21 away from the blue light chip 12, so that the light emitted by the quantum dot film layer 21 will all enter the filter 3, so that the light emitted from the filter 3 is purer, and the color saturation displayed by the MLED display panel is higher and the color gamut is wider.

[0069] In the embodiment of the present application, a light shielding layer 4 is provided between two adjacent filters 3, so that the display effect of the MLED display panel is better, but the light shielding layer 4 is adjacent to the filter 3, so that the light passing through the filter 3 will be partially absorbed by the light shielding layer 4, resulting in a decrease in the brightness of the light emitted from the filter 3. Figure 2 In the present application, a third reflective layer 6 is provided between the mutually adjacent light shielding layer 4 and the filter 3, and the third reflective layer 6 is in contact with the light shielding layer 4 and the filter 3 respectively. In this way, when the light passing through the filter 3 is irradiated to the light shielding layer 4, it will first irradiate the third reflective layer 6, and the third reflective layer 6 will reflect the light, so that the light passing through the filter 3 will not be lost, and the brightness after being emitted will not be reduced, ensuring that the display effect of the MLED display panel will not be affected.

[0070] In some embodiments, reference Figure 1 and Figure 2 , the orthographic projection of the blue light chip 12 on the substrate 11 is located within the orthographic projection of the quantum dot film layer 21 on the substrate 11 .

[0071] It should be noted that, through the above settings, the blue light emitted by the blue light chip 12 will all be emitted into the quantum dot film layer 21 corresponding to the blue light chip 12, that is, the quantum dot film layer 21 forms an independent emission channel for the blue light emitted by the blue light chip 12, so that each blue light emitted by the blue light chip 12 has an independent light path, and the emission of light of different colors does not interfere with each other, which is beneficial to improving the halo effect when the MLED display panel is displayed.

[0072] In some embodiments, reference Figure 2 The light emitting surface of the blue light chip 12 is provided with an optical path adhesive 120 , and the optical path adhesive 120 completely covers the light emitting surface of the blue light chip 12 .

[0073] The optical path glue 120 may be lens glue or UV glue, and the optical path glue 120 is used to concentrate the light so that the light emitting path is more concentrated vertically upward.

[0074] By setting an optical path glue 120 on the light-emitting surface of the blue light chip 12, the blue light emitted by the blue light chip 12 can be more concentrated and emitted vertically upward, which can effectively improve the conversion efficiency of the quantum dot film layer 21 for blue light, improve the utilization rate of light, and increase the brightness of the light converted by the quantum dot film layer 21, which is beneficial to enhance the brightness of the MLED display panel and thus improve the display effect.

[0075] In some embodiments, reference Figure 1 A first packaging layer 13 is provided on the surface of the substrate 11 at a position between two adjacent blue light chips 12 ; a second reflection layer 14 is provided on the first packaging layer 13 .

[0076] It should be noted that, since the substrate 11 is integrated with a PCB circuit board when it is set, it is necessary to use a first packaging layer 13 to package the substrate 11 after the blue light chip 12 is set. On the one hand, it can protect the circuit in the substrate 11, and on the other hand, it can also fix the blue light chip 12 to prevent the blue light chip 12 from loosening after long-term use, thereby affecting the light-emitting effect. The second reflection layer 14 is arranged on the first packaging layer 13 so that the light emitted by the blue light chip 12 is reflected toward the filter 3 when it hits the second reflection layer 14, and will not be absorbed by the first packaging layer 13, which can improve the utilization rate of light and the brightness of the light converted by the quantum dot film layer 21, which is conducive to enhancing the brightness of the MLED display panel, thereby improving the display effect.

[0077] For example, the sum of the thickness of the first encapsulation layer 13 and the thickness of the second reflective layer 14 provided on the substrate 11 is less than the thickness of the blue light chip 12, which is conducive to all the light emitted by the blue light chip 12 being irradiated into the quantum dot film layer 21 for conversion, and is not easily absorbed by the first encapsulation layer 13. The first encapsulation layer 13 can be an optical grade epoxy resin encapsulation glue with high viscosity, which is conducive to fixing the blue light chip 12, and the second reflective layer 14 can be a reflective film with high reflectivity, specifically a reflective film formed by white ink.

[0078] In some embodiments, reference Figure 1 and Figure 2 The surface of the quantum dot film layer 21 on one side close to the blue light chip 12 is in contact with the second reflective layer 14 and the optical path adhesive 120. This is conducive to all the blue light emitted by the blue light chip 12 being emitted into the quantum dot film layer 21, improving the light conversion rate, and then enhancing the brightness of the light converted by the quantum dot film layer 21, thereby enhancing the brightness of the MLED display panel and improving the display effect.

[0079] It should be noted that the realization of the above structure requires that a groove be set on the surface of the quantum dot film layer 21 close to the blue light chip 12 when designing and manufacturing the quantum dot composite film 2. In this way, after the quantum dot composite film 2 is installed on the light-emitting side of the blue light board 1, the blue light chip 12 and the optical path adhesive 120 are just stuck into the groove and are in contact with the bottom wall and side wall of the groove. The setting of the groove can also further reduce the difficulty of installing the quantum dot composite film 2 when manufacturing the MLED display panel.

[0080] In some embodiments, reference Figure 1 The light output protection layer 5 includes a second encapsulation layer 51 and an optical film 52. The second encapsulation layer 51 is disposed on the filter layer and the light shielding layer 4, and the optical film 52 is disposed on the second encapsulation layer 51. The second encapsulation layer 51 can protect the filter layer, ensuring that the light emitted from the filter 3 will not have color deviation, and the light color is purer. The optical film 52 can play a role in long-term wear resistance, long-term anti-fouling, and reducing fingerprints and stains, thereby protecting the screen and appearance of the MLED display panel.

[0081] Specifically, the second encapsulation layer 51 can be made of an encapsulation adhesive with low viscosity, good fluidity, and low bubble generation, and the light transmittance of the second encapsulation layer 51 is greater than 90%, which will neither affect the color purity nor the brightness of the light emitted by the filter 3.

[0082] refer to Figure 4 The optical film 52 is a protective film formed by a nano anti-fouling coating combining AG522 / AF521 and a PET substrate 524 through chemical bonding. The optical film 52 is composed of AF521, AG522, an optical functional layer 523 and a PET substrate 524 stacked together. A sticky adhesive 525 is coated on the surface of the PET substrate 524, and the adhesive 525 is bonded to the second packaging layer 51 to achieve the connection between the optical film 52 and the second packaging layer 51.

[0083] refer to Figure 5 , Figure 5Schematic diagram of local luminous light of the MLED display panel provided in the first embodiment of the present application. The propagation process of the light emitted by the blue light chip 12 of the MLED display panel in the first embodiment of the present application is as follows: the blue light chip 12 emits blue light, and the blue light radiates in all directions, wherein a part of the blue light is vertically concentrated and irradiated upward under the action of the optical path glue 120, and directly irradiates the filter 3, a part of the blue light irradiates the first reflection layer 22 and is reflected to the filter 3, and a part of the blue light irradiates the second reflection layer 14 and is reflected to the first reflection layer 22 and then reflected to the filter 3. In this way, after the arrangement of the first reflection layer 22 and the second reflection layer 14, the blue light chip 12 All the blue light emitted can irradiate the filter 3, which greatly improves the conversion efficiency of the quantum dot film layer 21; part of the light irradiating the filter 3 will directly pass through the second packaging layer 51 and the optical film 52 to be emitted, and another part will irradiate the third reflective layer 6, and after being reflected by the third reflective layer 6, it will also be emitted from the second packaging layer 51 and the optical film 52. In this way, the light irradiating the filter 3 will not be lost, which is beneficial to improve the brightness of the light emitted from the filter 3, thereby improving the display brightness of the MLED display panel and improving the display effect.

[0084] In some embodiments, each blue light chip 12 disposed on the substrate 11 can be connected to a control chip, so that each blue light chip 12 can be independently controlled by the control chip to which it is connected, thereby being able to individually control the light emission of each filter 3 and the mixing of multiple colors of light, thereby improving the accuracy of pixel light emission.

[0085] Of course, in addition to the above method, the blue light chips 12 in the same row or column can also be connected to the same control chip, so that the light emission of the blue light chips 12 in the same row or column can be controlled to control the light emitting area and the mixed light area, thereby improving the accuracy of pixel light emission.

[0086] Embodiment 2

[0087] refer to Figure 6 The MLED display panel provided in the second embodiment of the present application is different from that in the first embodiment only in that the quantum dot composite film 2 is arranged at a different position relative to the blue light board 1. In the second embodiment of the present application, the second reflective layer 14 covers the first encapsulation layer 13 and the optical path adhesive 120, and the surface of the second reflective layer 14 on the side away from the blue light chip 12 is parallel to the substrate 11; the quantum dot composite film 2 is arranged on the surface of the second reflective layer 14 on the side away from the blue light chip 12.

[0088] It should be noted that the blue light emitted by all blue light chips 12 in the second embodiment forms a blue light source, and the blue light source will be irradiated on the quantum dot composite film 2 as a whole. At this time, the blue light irradiated on the quantum dot film layer 21 will be converted, and the quantum dot film layer 21 also forms an independent channel for light propagation, which is conducive to improving color deviation and increasing the color gamut. However, compared with the first embodiment, the blue light emitted by the blue light chip 12 of the second embodiment will not be completely converted by the quantum dot film, and the brightness displayed by the MLED display panel is not as high as the brightness displayed by the MLED display panel in the first embodiment.

[0089] In the second embodiment of the present application, since the quantum dot composite film 2 is disposed on the second reflective layer 14, it is not necessary to provide a groove on the surface of the quantum dot film layer 21 on one side close to the blue light chip 12 when the quantum dot composite film 2 is manufactured, which can also improve the manufacturing efficiency of the quantum dot composite film 2. It should be noted that when the quantum dot composite film 2 is provided, it is necessary to ensure that each quantum dot film layer 21 corresponds to a blue light chip 12, so that more blue light can be converted to a greater extent, and the brightness of the light emitted by the quantum dot film layer 21 can be improved.

[0090] Embodiment 3

[0091] refer to Figure 7 Embodiment 3 of the present application provides a method for preparing an MLED display panel, which is used to prepare the MLED display panel of Embodiment 1, and comprises the following steps:

[0092] S101 , manufacturing a blue light board 1 , wherein the blue light board 1 comprises a substrate 11 and a plurality of blue light chips 12 disposed on the substrate 11 .

[0093] The blue light board 1 is a light board formed by arranging multiple blue light chips 12 on a substrate 11. The substrate 11 is composed of a glass plate, a PCB circuit board, etc. Specifically, the glass plate can be etched first, the circuit can be embedded and the circuit can be laid out. A solder pad 112 is reserved at the position where the blue light chip 12 needs to be set, and a solder pad 112 is also required at the position where the control chip is set, so that the blue light chip 12 and the control chip can be electrically connected to the PCB circuit board after being set on the substrate 11 to realize the lighting function and the control function.

[0094] S102 , forming a first encapsulation layer 13 on the substrate 11 , and forming a second reflective layer 14 on the first encapsulation layer 13 .

[0095] S103 , forming an optical path adhesive 120 on the light emitting surface of the blue light chip 12 .

[0096] S104 , manufacturing a quantum dot composite film 2 , wherein the quantum dot composite film 2 includes a plurality of quantum dot film layers 21 and a first reflective layer 22 located between two adjacent quantum dot film layers 21 .

[0097] S105, disposing the quantum dot composite film 2 on the light-emitting side of the blue light panel 1, so that the surface of each quantum dot film layer 21 close to the blue light chip 12 is in contact with the second reflective layer 14 and the optical path adhesive 120 of the corresponding light-emitting surface of a blue light chip 12 respectively.

[0098] S106, forming a filter layer on the quantum dot composite film 2, wherein the filter layer includes a plurality of filters 3 that are in one-to-one contact with the plurality of quantum dot film layers 21, and the filters 3 and quantum dot film layers 21 that are in contact with each other have the same color.

[0099] S107 , forming a light shielding layer 4 on the same layer as the filter layer on the quantum dot composite film 2 , wherein the light shielding layer 4 is located between two adjacent filters 3 .

[0100] S108 , preparing a light protection layer 5 on the filter layer and the light shielding layer 4 .

[0101] By using the above preparation method to prepare the MLED display panel, it is only necessary to transfer the blue light chip 12 to the substrate 11. Compared with the prior art that requires the red light-emitting chip, the green light-emitting chip and the blue light-emitting chip to be transferred separately to the substrate 11, the transfer process of the present application is significantly reduced. This not only improves the efficiency of chip transfer, but also only has one type of chip. It can ensure that the arrangement position of the chip after transfer is more accurate, will not affect the display effect, and the cost of chip transfer can also be reduced.

[0102] In addition, a quantum dot composite film 2 is arranged on the light-emitting side of the blue light panel 1, and the blue light emitted by the blue light chip 12 will be converted into light of corresponding color when it is irradiated on the quantum dot film layer 21. Compared with the electroluminescence method in the prior art, this quantum dot photoluminescence method has a smaller half-wave peak width of the wavelength peak, so that the emitted light is purer and the color deviation is improved. Moreover, by changing the size of the quantum particles in the quantum dot film layer 21, the blue light can be effectively converted into red light, green light and blue light in the wavelength range we specifically need, thereby improving the color saturation of the display and enhancing the color gamut range.

[0103] Furthermore, the above step S101 specifically includes the following steps:

[0104] S1011 , preparing a substrate 11 , the substrate 11 having a binding area 111 , and the binding area 111 is provided with a solder pad 112 .

[0105] Figure 9-1 Yes Complete Figure 8 Device structure diagram of step S1011 in FIG.

[0106] S1012 , forming a blue light chip 12 on the growth substrate 7 , wherein two electrodes are disposed on a side of the blue light chip 12 close to the growth substrate 7 .

[0107] Figure 9-2 Yes Complete Figure 8 Device structure diagram of step S1012 in FIG.

[0108] S1013 , bonding the transfer substrate 8 to the surface of the blue light chip 12 which is away from the growth substrate 7 .

[0109] Figure 9-3 Yes Complete Figure 8 Device structure diagram of step S1013 in FIG.

[0110] S1014 , removing the transfer substrate 8 bonded with the blue light chip 12 , so that the blue light chip 12 is separated from the growth substrate 7 .

[0111] Figure 9-4 Yes Complete Figure 8 Device structure diagram of step S1014 in FIG.

[0112] S1015 , aligning and laminating the transfer substrate 8 and the substrate 11 , so that the two electrodes of the blue light chip 12 are aligned and connected one by one with the pads 112 of the binding area 111 on the substrate 11 .

[0113] Figure 9-5 Yes Complete Figure 8 Device structure diagram of step S1015.

[0114] S1016 , removing the transfer substrate 8 , so that the blue light chip 12 is transferred to the substrate 11 .

[0115] Figure 9-6 Yes Complete Figure 8 Device structure diagram of step S1016 in FIG.

[0116] Embodiment 4

[0117] refer to Fig.10 Embodiment 4 of the present application provides a method for preparing an MLED display panel, which is used to prepare the MLED display panel of Embodiment 2, and comprises the following steps:

[0118] S201 , manufacturing a blue light board 1 , wherein the blue light board 1 comprises a substrate 11 and a plurality of blue light chips 12 disposed on the substrate 11 .

[0119] S202 , forming an optical path adhesive 120 on the light emitting surface of the blue light chip 12 .

[0120] S203 , forming a first encapsulation layer 13 on the substrate 11 , and forming a second reflection layer 14 on the first encapsulation layer 13 , so that the second reflection layer 14 covers the first encapsulation layer 13 and the optical path adhesive 120 .

[0121] S204 , manufacturing a quantum dot composite film 2 , wherein the quantum dot composite film 2 includes a plurality of quantum dot film layers 21 and a first reflective layer 22 located between two adjacent quantum dot film layers 21 .

[0122] S205 , disposing the quantum dot composite film 2 on the second reflective layer 14 .

[0123] S206 , forming a filter layer on the quantum dot composite film 2 , wherein the filter layer includes a plurality of filters 3 that are in one-to-one contact with the plurality of quantum dot film layers 21 , and the filters 3 and quantum dot film layers 21 that are in contact with each other have the same color.

[0124] S207 , forming a light shielding layer 4 on the same layer as the filter layer on the quantum dot composite film 2 , wherein the light shielding layer 4 is located between two adjacent filters 3 .

[0125] S208 , preparing a light protection layer 5 on the filter layer and the light shielding layer 4 .

[0126] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An MLED display panel, characterized in that: include: A blue light panel (1) comprises a substrate (11) and a plurality of blue light chips (12) arranged on the substrate (11); A quantum dot composite film (2) is arranged on the light-emitting side of the blue light panel (1), the quantum dot composite film (2) comprising a plurality of quantum dot film layers (21) and a first reflection layer (22) located between two adjacent quantum dot films (21), the plurality of quantum dot film layers (21) comprising a red quantum dot film layer, a green quantum dot film layer and a blue quantum dot film layer; A filter layer is provided on the quantum dot composite film (2), the filter layer comprising a plurality of filters (3), the plurality of filters (3) being in contact with the plurality of quantum dot film layers (21) in a one-to-one correspondence, and the mutually contacting filters (3) and quantum dot film layers (21) have the same color; A light shielding layer (4) is provided on the quantum dot composite film (2) and is located between two adjacent filters (3); The light-exiting protection layer (5) is arranged on the light-filtering layer and the light-shielding layer (4).

2. The MLED display panel according to claim 1, characterized in that: The orthographic projection of the blue light chip (12) on the substrate (11) is located within the orthographic projection of the quantum dot film layer (21) on the substrate (11).

3. The MLED display panel according to claim 1 or 2, characterized in that: The light-emitting surface of the blue light chip (12) is provided with an optical path adhesive (120), and the optical path adhesive (120) completely covers the light-emitting surface of the blue light chip (12).

4. The MLED display panel according to claim 3, characterized in that: A first packaging layer (13) is provided on the surface of the substrate (11) at a position between two adjacent blue light chips (12); A second reflective layer (14) is provided on the first packaging layer (13).

5. The MLED display panel according to claim 4, characterized in that: A surface of one side of the quantum dot film layer (21) close to the blue light chip (12) is in contact with the second reflective layer (14) and the optical path adhesive (120) respectively.

6. The MLED display panel according to claim 4, characterized in that: The second reflective layer (14) covers the first packaging layer (13) and the optical path adhesive (120), and a surface of the second reflective layer (14) on a side away from the blue light chip (12) is parallel to the substrate (11); The quantum dot composite film (2) is arranged on a surface of the second reflective layer (14) on a side away from the blue light chip (12).

7. The MLED display panel according to any one of claims 1-2, 4-6, characterized in that: A third reflective layer (6) is provided between the mutually adjacent light-shielding layer (4) and the optical filter (3), and the third reflective layer (6) is in contact with the light-shielding layer (4) and the optical filter (3) respectively.

8. The MLED display panel according to any one of claims 1-2, 4-6, characterized in that: The light-exiting protection layer (5) comprises a second encapsulation layer (51) and an optical film (52); the second encapsulation layer (51) is arranged on the filter layer and the light-shielding layer (4); and the optical film (52) is arranged on the second encapsulation layer (51).

9. A method for preparing an MLED display panel, for preparing the MLED display panel as claimed in claim 5, characterized in that: include: A blue light panel (1) is manufactured, wherein the blue light panel (1) comprises a substrate (11) and a plurality of blue light chips (12) arranged on the substrate (11); forming a first encapsulation layer (13) on the substrate (11), and forming a second reflection layer (14) on the first encapsulation layer (13); forming an optical path adhesive (120) on the light emitting surface of the blue light chip (12); Producing a quantum dot composite film (2), the quantum dot composite film (2) comprising a plurality of quantum dot film layers (21) and a first reflective layer (22) located between two adjacent quantum dot film layers (21); The quantum dot composite film (2) is arranged on the light-emitting side of the blue light panel (1), so that a surface of each quantum dot film layer (21) close to the blue light chip (12) is in contact with the second reflective layer (14) and the optical path adhesive (120) of a corresponding light-emitting surface of the blue light chip (12); A filter layer is formed on the quantum dot composite film (2), wherein the filter layer comprises a plurality of filters (3) that are in one-to-one contact with the plurality of quantum dot film layers (21), and the filters (3) and the quantum dot film layers (21) that are in contact with each other have the same color; A light shielding layer (4) is formed on the quantum dot composite film (2) and is in the same layer as the filter layer, wherein the light shielding layer (4) is located between two adjacent filters (3); A light protection layer (5) is prepared on the filter layer and the light shielding layer (4).

10. A method for preparing an MLED display panel, for preparing the MLED display panel according to claim 6, characterized in that: include: A blue light panel (1) is manufactured, wherein the blue light panel (1) comprises a substrate (11) and a plurality of blue light chips (12) arranged on the substrate (11); forming an optical path adhesive (120) on the light emitting surface of the blue light chip (12); Forming a first encapsulation layer (13) on the substrate (11), and forming a second reflection layer (14) on the first encapsulation layer (13), so that the second reflection layer (14) covers the first encapsulation layer (13) and the optical path adhesive (120); Producing a quantum dot composite film (2), the quantum dot composite film (2) comprising a plurality of quantum dot film layers (21) and a first reflective layer (22) located between two adjacent quantum dot film layers (21); Arranging the quantum dot composite film (2) on the second reflective layer (14); A filter layer is formed on the quantum dot composite film (2), wherein the filter layer comprises a plurality of filters (3) that are in one-to-one contact with the plurality of quantum dot film layers (21), and the filters (3) and the quantum dot film layers (21) that are in contact with each other have the same color; A light shielding layer (4) is formed on the quantum dot composite film (2) and is in the same layer as the filter layer, wherein the light shielding layer (4) is located between two adjacent filters (3); A light protection layer (5) is prepared on the filter layer and the light shielding layer (4).

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