A red-green plate structure quantum dot functional plate and preparation method thereof

Abstract

The invention relates to the field of quantum dot functional boards, and in particular to a red-green board structure quantum dot functional board and a preparation method thereof; the method comprises the following steps: setting initial control parameters, the initial control parameters comprising extrusion temperature, extrusion pressure and extrusion speed; controlling a multilayer co-extrusion device to prepare a red-green board structure quantum dot functional board based on the initial control parameters; respectively obtaining spectrum detection data on both sides of the red-green board structure quantum dot functional board, and determining the quantum dot distribution uniformity of a corresponding quantum dot functional layer according to the spectrum detection data; adjusting the control parameters of a corresponding extrusion channel according to the determination result of the quantum dot distribution uniformity on both sides of the red-green structure quantum dot functional board, and controlling a multilayer co-extrusion device to prepare a red-green board structure quantum dot functional board based on the adjusted control parameters; the invention helps to improve the distribution uniformity of quantum dots in a quantum dot functional layer, and helps to simplify the preparation process of a quantum dot functional board.

Description

Technical Field

[0001] The invention relates to the field of quantum dot functional boards, and in particular to a quantum dot functional board with a red-green board structure and a preparation method thereof. Background Art

[0002] Quantum dot functional materials have broad application prospects in display technology, optical sensors, solar cells and other fields due to their excellent optoelectronic properties. In particular, quantum dot functional boards can convert incident light of a specific wavelength into red or green light, significantly improving the color saturation and brightness of the display. Therefore, how to efficiently and stably prepare high-quality quantum dot functional boards has become a hot topic in research and industry.

[0003] At present, the process of manufacturing quantum dot functional layers using multi-layer co-extrusion technology mainly involves mixing quantum dot compounds with polymer matrix and forming multi-layer structures through co-extrusion process. These structures usually contain multiple active layers with different quantum dots to achieve the desired optoelectronic properties.

[0004] However, in the actual production process, the distribution of quantum dots in the functional layer is often uneven. This uneven distribution will cause the photoelectric performance of the functional layer to fluctuate, which in turn affects the performance of related optoelectronic devices. Current manufacturing technologies often lack real-time detection and feedback control systems, making it difficult to accurately control and adjust the distribution of quantum dots, thus affecting the performance and quality stability of the final product. Summary of the invention

[0005] In response to the problems of uneven distribution of quantum dots and lack of real-time detection and feedback mechanism during the preparation of quantum dot functional boards, the present invention provides a red-green board structure quantum dot functional board and a preparation method thereof, aiming to improve the distribution uniformity of quantum dots in the quantum dot functional layer and optimize the preparation process of the quantum dot functional board.

[0006] In a first aspect, the method for preparing a red-green structure quantum dot functional board provided by the present invention comprises the following steps: setting initial control parameters, wherein the initial control parameters include the extrusion temperature, extrusion pressure and extrusion speed of at least one extrusion channel of a multilayer co-extrusion device; based on the initial control parameters, controlling the multilayer co-extrusion device to prepare a red-green board structure quantum dot functional board, wherein the red-green board structure quantum dot functional board comprises a red light quantum dot functional layer, an intermediate layer and a green light quantum dot functional layer from top to bottom; respectively obtaining spectral detection data on both sides of the red-green board structure quantum dot functional board, and determining the quantum dot distribution uniformity of the corresponding quantum dot functional layer according to the spectral detection data; adjusting the control parameters of the corresponding extrusion channel according to the determination result of the quantum dot distribution uniformity on both sides of the red-green structure quantum dot functional board, and controlling the multilayer co-extrusion device to prepare the red-green board structure quantum dot functional board based on the adjusted control parameters.

[0007] The benefits of the method for preparing a red-green structure quantum dot functional board provided by the present invention are as follows: the present invention prepares the red-green structure quantum dot functional board through co-extrusion technology, simplifies the manufacturing process, significantly improves production efficiency, and avoids the complexity and cost caused by the use of adhesives; at the same time, the present invention realizes the monitoring of the quantum dot distribution uniformity of the corresponding quantum dot functional layer through the spectral monitoring data of the quantum dot functional layer on both sides of the red-green structure quantum dot functional board; and adjusts the control parameters of the corresponding extrusion channel according to the quantum dot distribution uniformity judgment result, realizes feedback adjustment of the multi-layer co-extrusion equipment, enhances the controllability and accuracy of the production process, and helps to achieve uniform distribution and high-quality production of quantum dots in the quantum dot functional layer.

[0008] Furthermore, the multi-layer co-extrusion equipment is a three-layer co-extrusion equipment, which includes a first side layer extrusion channel, a middle layer extrusion channel and a second side layer extrusion channel; wherein the first side layer extrusion channel is used to prepare one of the red light quantum dot functional layers or the green light quantum dot functional layers, the middle layer extrusion channel is used to prepare the middle layer, and the second side layer extrusion channel is used to prepare the other of the red light quantum dot functional layers or the green light quantum dot functional layers.

[0009] Furthermore, the method of respectively acquiring the spectral detection data on both sides of the red and green board structure quantum dot functional board includes the following steps: setting a first detection light source on a first side of the red and green board structure quantum dot functional board, and irradiating the first side with the first detection light source; setting a second detection light source on a second side of the red and green board structure quantum dot functional board, and irradiating the second side with the second detection light source; setting a first receiving device on the first side, and receiving a first reflected light of the first detection light source on the first side with the first receiving device, and obtaining the first spectral detection data of the red and green board structure quantum dot functional board through the first reflected light; setting a second receiving device on the second side, and receiving a second reflected light of the second detection light source on the second side with the second receiving device, and obtaining the second spectral detection data of the red and green board structure quantum dot functional board through the first reflected light.

[0010] Furthermore, the method of respectively obtaining the spectral detection data on both sides of the quantum dot functional board of the red and green board structure also includes the following steps: obtaining a first spectral characteristic statistic based on the spectral detection data of at least three detection points on the first side, and determining the quantum dot distribution uniformity of the quantum dot functional layer corresponding to the first side based on the first spectral characteristic statistic; obtaining a second spectral characteristic statistic based on the spectral detection data of at least three detection points on the second side, and determining the quantum dot distribution uniformity of the quantum dot functional layer corresponding to the second side based on the second spectral characteristic statistics.

[0011] Furthermore, the quantum dot distribution uniformity of the quantum dot functional layer corresponding to any side meets the following judgment rules: when there is a spectral feature standard deviation that exceeds 5% of the corresponding spectral feature average value, the quantum dot distribution uniformity of the quantum dot functional layer corresponding to the side is judged to be non-uniform; otherwise, the quantum dot distribution uniformity of the quantum dot functional layer corresponding to the side is judged to be uniform.

[0012] Furthermore, the standard deviation of any spectral feature satisfies the following calculation model: ,in, represents the standard deviation of the spectral feature x, , i represents the detection point number, N represents the number of detection points, Represents the spectral characteristic value of the i-th detection point.

[0013] Furthermore, the spectral characteristics include a light intensity peak, a central wavelength corresponding to the light intensity peak, and a peak half-width.

[0014] Furthermore, the control parameters of the corresponding extrusion channel are adjusted according to the quantum dot distribution uniformity judgment result on both sides of the red and green structure quantum dot functional board, including the following control rules: if the standard deviation of the light intensity peak in the quantum dot distribution uniformity judgment result on one side exceeds 5% of the light intensity peak average value, the extrusion temperature of the corresponding extrusion channel is adjusted; if the standard deviation of the light intensity peak in the quantum x dot distribution uniformity judgment result on one side does not exceed 5% of the light intensity peak average value, but the standard deviation of the central wavelength exceeds 5% of the central wavelength average value, the extrusion pressure of the corresponding extrusion channel is adjusted; if the standard deviation of the light intensity peak in the quantum dot distribution uniformity judgment result on one side does not exceed 5% of the light intensity peak average value, the standard deviation of the central wavelength does not exceed 5% of the central wavelength average value, but the standard deviation of the peak half-width exceeds 5% of the peak half-width average value, the extrusion speed of the corresponding extrusion channel is adjusted.

[0015] Furthermore, the control parameters of the corresponding extrusion channel are adjusted according to the judgment result of the uniformity of the quantum dot distribution on both sides of the red and green structure quantum dot functional board, and the following rules are also included: if the extrusion temperature of the extrusion channel is adjusted, the difference in the extrusion temperature before and after the adjustment of the corresponding basic channel shall not exceed 2°C; if the extrusion pressure of the extrusion channel is adjusted, the difference in the extrusion pressure before and after the adjustment of the corresponding basic channel shall not exceed 2Mpa; if the extrusion speed of the extrusion channel is adjusted, the extrusion pressure speed of the corresponding basic channel before and after adjustment shall not exceed 0.1m / min.

[0016] In the second aspect, the red-green board structure quantum dot functional board provided by the present invention is prepared by the above-mentioned red-green structure quantum dot functional board preparation method, and from top to bottom are a red light quantum dot functional layer, an intermediate layer and a green light quantum dot functional layer; wherein the red light quantum dot functional layer is used to convert incident light into red light; the green light quantum dot functional layer is used to convert incident light into green light; the intermediate layer is used to isolate the red light quantum dot functional layer and the green light quantum dot functional layer.

[0017] The red-green board structure quantum dot functional board provided by the present invention has the advantage that the present invention replaces the traditional sandwich structure with a red light quantum dot functional layer and a green light quantum dot functional layer, and realizes one-time molding by using a multi-layer co-extrusion technology, thereby greatly simplifying the preparation process of the quantum dot film structure and improving production efficiency; in addition, the present invention eliminates the barrier film in the traditional quantum dot functional film structure, significantly reducing the manufacturing cost; at the same time, the red light quantum dot functional layer and the green light quantum dot functional layer are respectively placed on both sides of the middle layer, so that the quantum dot characteristics can be directly and conveniently tested, which is convenient for customers to verify the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A method for preparing a red-green structure quantum dot functional board provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the film structure of a red-green structure quantum dot functional board provided by an embodiment of the present invention;

[0020] Figure 3 A first flow chart for the specific implementation of step S03 provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the positional relationship between a detection light source, a receiving device, and a red-green board structure quantum dot functional board provided in an embodiment of the present invention;

[0022] Figure 5 A second flow chart for the specific implementation of step S03 provided in an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of control parameter adjustment provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described herein are only for illustration and are not intended to limit the present invention. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that these specific details do not need to be adopted to implement the present invention. In other examples, in order to avoid confusing the present invention, known circuits, software or methods are not specifically described.

[0025] In one embodiment, see Figure 1 and Figure 2 , Figure 1 The method for preparing the red-green structure quantum dot functional board provided by the embodiment of the present invention is as follows: Figure 2 Schematic diagram of the film layer structure of the red-green structure quantum dot functional plate provided in an embodiment of the present invention.

[0026] like Figure 1 As shown, the method for preparing the red-green structure quantum dot functional board provided by the embodiment of the present invention comprises the following steps:

[0027] S01. Setting initial control parameters, wherein the initial control parameters include extrusion temperature, extrusion pressure and extrusion speed of at least one extrusion channel of a multi-layer co-extrusion device.

[0028] In this embodiment, the initial control parameters are various operating parameters set by relevant process control personnel according to manufacturing experience or relevant indicators during the initial startup and operation of the multi-layer co-extrusion equipment.

[0029] Furthermore, the multi-layer co-extrusion equipment used in the present invention is a three-layer co-extrusion equipment; the three-layer co-extrusion equipment includes a first side layer extrusion channel, a middle layer extrusion channel and a second side layer extrusion channel.

[0030] Among them, the first side layer extrusion channel is used to prepare one of the red light quantum dot functional layer or the green light quantum dot functional layer, the middle layer extrusion channel is used to prepare the middle layer, and the second side layer extrusion channel is used to prepare the red light quantum dot functional layer or the other of the green light quantum dot functional layer.

[0031] It can be understood that if the first side layer extrusion channel is used to make a red light quantum dot functional layer, the second side layer extrusion channel is used to make a green light quantum dot functional layer; if the first side layer extrusion channel is used to make a green light quantum dot functional layer, the second side layer extrusion channel is used to make a red light quantum dot functional layer.

[0032] Furthermore, the initial control parameters specifically include the extrusion temperature, extrusion pressure and extrusion speed of the first side layer extrusion channel, the middle layer extrusion channel and the second side layer extrusion channel.

[0033] S02. Based on the initial control parameters, control the multi-layer co-extrusion equipment to prepare a red-green board structure quantum dot functional board, wherein the red-green board structure quantum dot functional board comprises a red light quantum dot functional layer, an intermediate layer and a green light quantum dot functional layer from top to bottom.

[0034] like Figure 2As shown, the red-green board structure quantum dot functional board prepared in this embodiment specifically includes: a red light quantum dot functional layer 100, an intermediate layer 200 and a green light quantum dot functional layer 300.

[0035] One side of the intermediate layer 200 is the red light quantum dot functional layer 100 , and the side of the intermediate layer 200 away from the red light quantum dot functional layer 100 is the green light quantum dot functional layer 300 .

[0036] Furthermore, the red light quantum dot functional layer 100 is used to convert incident light into red light; the green light quantum dot functional layer 300 is used to convert incident light into green light; and the intermediate layer 200 is used to isolate the red light quantum dot functional layer and the green light quantum dot functional layer.

[0037] In this embodiment, the red quantum dot functional layer 100 is prepared based on the red quantum dot functional layer masterbatch input into the first side layer extrusion channel; the green quantum dot functional layer 300 is prepared based on the green quantum dot functional layer masterbatch input into the second side layer extrusion channel.

[0038] Furthermore, the red light quantum dot functional layer masterbatch is a prefabricated particle made by uniformly mixing the red light quantum dot material A with the polymer base material and other additives through a melt extrusion and granulation process, and the diameter ranges from 2 mm to 5 mm; the particle length is generally between 3 mm and 5 mm.

[0039] Similarly, the green light quantum dot functional layer masterbatch is a prefabricated particle made by evenly mixing the green light quantum dot material B with the polymer base material and other additives through a melt extrusion and granulation process. The diameter ranges from 2 mm to 5 mm; the particle length is usually between 3 mm and 5 mm.

[0040] The red light quantum dot material A includes but is not limited to any one of cadmium selenide red light quantum dot materials, indium phosphide red light quantum dot materials, and perovskite red light quantum dot materials.

[0041] The green light quantum dot material B includes but is not limited to any one of cadmium selenide green light quantum dot materials, indium phosphide green light quantum dot materials, and perovskite green light quantum dot materials.

[0042] The polymer base material includes, but is not limited to, any one of styrene monomer, methyl methacrylate monomer, ethylene monomer, propylene monomer, vinyl acetate monomer, bisphenol A and phosgene.

[0043] The polymerization auxiliary materials include, but are not limited to, one or more polymerization auxiliary agents selected from the group consisting of dispersants, antioxidants, ultraviolet absorbers, stabilizers, and binders.

[0044] In this embodiment, the mass proportion of the red light quantum dot material in the red light quantum dot functional layer masterbatch is 1% to 10%, the mass proportion of the polymer base material is 80% to 95%, and the mass proportion of the polymer auxiliary material is 1% to 10%.

[0045] Furthermore, in the green quantum dot functional layer masterbatch, the mass proportion of the green quantum dot material is 1% to 10%, the mass proportion of the polymer base material is 80% to 95%, and the mass proportion of the polymer auxiliary material is 1% to 10%.

[0046] S03, respectively obtaining spectrum detection data of both sides of the red and green board structure quantum dot functional board, and determining the quantum dot distribution uniformity of the corresponding quantum dot functional layer according to the spectrum detection data.

[0047] See also Figure 3 and Figure 4 , Figure 3 The first flow chart for the specific implementation of step S03 provided in the embodiment of the present invention is as follows: Figure 4 Schematic diagram of the positional relationship of the detection light source, receiving device and red-green board structure quantum dot functional board provided in an embodiment of the present invention.

[0048] like Figure 3 As shown, the step S03 of respectively acquiring the spectrum detection data of both sides of the red and green board structure quantum dot functional board includes the following steps:

[0049] S0311. Set a first detection light source on a first side of the red-green board structure quantum dot functional board, and use the first detection light source to illuminate the first side.

[0050] Wherein, the first detection light source is a blue light source or an ultraviolet light source.

[0051] In this embodiment, the first side surface of the red-green board structure quantum dot functional board is the red light quantum dot functional layer surface 100 .

[0052] like Figure 4 As shown, the first side surface is on the light outlet side of the first detection light source 11. When the first detection light source 11 irradiates the first side surface, the first detection light source 11 excites the red light quantum dots in the red light quantum dot functional layer, and the red quantum dots emit red light, so that the reflected light on the surface of the red light quantum dot functional layer is mainly red light.

[0053] S0312. Set a second detection light source on the second side of the red-green board structure quantum dot functional board, and use the second detection light source to illuminate the second side.

[0054] Similarly, the second detection light source is a blue light source or an ultraviolet light source.

[0055] In this embodiment, the second side surface of the red-green board structure quantum dot functional board is the green light quantum dot functional layer surface 300 .

[0056] like Figure 4 As shown, the second side is on the light outlet side of the second detection light source 21. When the second detection light source 21 irradiates the second side, the second detection light source 21 excites the green light quantum dots in the green light quantum dot functional layer, and the green quantum dots emit green light, so that the reflected light on the surface of the green light quantum dot functional layer is mainly green light.

[0057] S0313. Set a first receiving device on the first side, and use the first receiving device to receive the first reflected light of the first detection light source on the first side, and obtain the first spectrum detection data of the red-green board structure quantum dot functional board through the first reflected light.

[0058] like Figure 4 As shown, the first receiving device 12 is disposed on the first side. It can be understood that the first receiving device is used to receive the first reflected light and convert the first reflected light into an electrical signal and transmit it to the corresponding spectral analysis device.

[0059] S0314. Set the second receiving device on the second side, and use the second receiving device to receive the second reflected light of the second detection light source on the second side, and obtain the second spectral detection data of the red-green board structure quantum dot functional board through the first reflected light.

[0060] like Figure 4 As shown, the second receiving device 22 is disposed on the first side. It can be understood that the first receiving device is used to receive the first reflected light and convert the first reflected light into an electrical signal and transmit it to the corresponding spectral analysis device.

[0061] In another embodiment or embodiments, in order to avoid the influence of the contralateral detection light source during the double-sided spectrum detection, in steps S0312 and S0314, the first detection light source and the second detection light source are operated alternately.

[0062] Specifically, when the first detection light source illuminates the first side surface, the second detection light source is turned off; when the second detection light source illuminates the second side surface, the first detection light source is turned off.

[0063] For further information, see Figure 5 , Figure 5 The second flow chart for the specific implementation of step S03 provided in the embodiment of the present invention. Figure 5 As shown, step S03 of evaluating the quantum dot distribution uniformity of the corresponding quantum dot functional layer according to the spectral detection data includes the following steps:

[0064] S0321. Obtain a first spectral characteristic statistic based on spectral detection data of at least three detection points on the first side, and determine the quantum dot distribution uniformity of the quantum dot functional layer corresponding to the first side based on the first spectral characteristic statistic.

[0065] In this embodiment, the quantum dot functional layer corresponding to the first side surface is a red light quantum dot functional layer.

[0066] Furthermore, the first spectral characteristic statistics include a standard deviation of a peak value of the intensity of the first reflected light, a standard deviation of a central wavelength corresponding to the peak value of the intensity, and a standard deviation of a peak half-height width.

[0067] Specifically, the light intensity peak standard deviation, the spectrum peak standard deviation, and the peak half-height width standard deviation of the first reflected light respectively satisfy the following calculation models: , , .

[0068] in, represents the standard deviation of the peak intensity of the first reflected light, N represents the number of detection points, represents the peak light intensity of the i-th detection point, represents the standard deviation of the spectral peak of the first reflected light, represents the central wavelength of the i-th detection point, represents the standard deviation of the peak half-height width of the first reflected light, Represents the peak half-width of the i-th detection point.

[0069] Furthermore, the quantum dot distribution uniformity of the corresponding quantum dot functional layer is determined according to the spectral detection data in step S0321, and the following evaluation rule table is satisfied:

[0070]

[0071] In the above table, "yes" indicates that the standard deviation of the corresponding spectral feature value exceeds 5% of the average value of the corresponding spectral feature value, and "no" indicates that the standard deviation of the corresponding spectral feature value does not exceed 5% of the average value of the corresponding spectral feature value.

[0072] Further, as shown in the above table, when the standard deviation of the light intensity peak of the first reflected light does not exceed 5% of the average value of the light intensity peak, and the standard deviation of the central wavelength does not exceed 5% of the average value of the central wavelength, and the standard deviation of the peak half-width exceeds 5% of the average value of the peak half-width, the quantum dot distribution uniformity of the quantum dot functional layer corresponding to the first side is judged to be uniform; other than that, in all other cases, the quantum dot distribution uniformity of the quantum dot functional layer corresponding to the first side is judged to be uneven.

[0073] S0322. Obtain second spectral characteristic statistics based on spectral detection data of at least three detection points on the second side, and determine the quantum dot distribution uniformity of the quantum dot functional layer corresponding to the second side based on the second spectral characteristic statistics.

[0074] The specific evaluation method for the uniformity of quantum dot distribution of the quantum dot functional layer corresponding to the second side can refer to the method for evaluating the uniformity of quantum dot distribution of the quantum dot functional layer corresponding to the first side, which will not be repeated here.

[0075] S04. According to the determination result of the uniformity of the quantum dot distribution on both sides of the red-green structure quantum dot functional board, the control parameters of the corresponding extrusion channel are adjusted, and based on the adjusted control parameters, the multilayer co-extrusion equipment is controlled to prepare the red-green board structure quantum dot functional board.

[0076] In this embodiment, the step S04 of adjusting the control parameters of the corresponding extrusion channel according to the determination result of the uniformity of the quantum dot distribution on both sides of the red and green structure quantum dot functional board includes the following steps:

[0077] S041. Adjust the extrusion temperature, extrusion pressure or extrusion speed of the first side layer extrusion channel according to the uniformity of the quantum dot distribution on the first side surface.

[0078] In this embodiment, as shown in the above table, the step S041 of adjusting the extrusion temperature, extrusion pressure or extrusion speed of the first side layer extrusion channel according to the uniformity of the quantum dot distribution on the first side includes the following control rules:

[0079] If the standard deviation of the light intensity peak in the quantum dot distribution uniformity judgment result of the first side exceeds 5% of the average light intensity peak, the extrusion temperature of the corresponding extrusion channel is adjusted; if the standard deviation of the light intensity peak in the quantum dot distribution uniformity judgment result of the first side does not exceed 5% of the average light intensity peak, but the standard deviation of the central wavelength exceeds 5% of the average central wavelength, the extrusion pressure of the corresponding extrusion channel is adjusted; if the standard deviation of the light intensity peak in the quantum dot distribution uniformity judgment result of the first side does not exceed 5% of the average light intensity peak, the standard deviation of the central wavelength does not exceed 5% of the average central wavelength, but the standard deviation of the peak half-width exceeds 5% of the average peak half-width, the extrusion speed of the corresponding extrusion channel is adjusted.

[0080] Furthermore, in order to avoid unnecessary fluctuations and material damage caused by excessive adjustments during the production process, the following constraints are also included in any control parameter adjustment process:

[0081] If the extrusion temperature of the extrusion channel is adjusted, the difference in extrusion temperature before and after the adjustment of the corresponding basic channel shall not exceed 2°C; if the extrusion pressure of the extrusion channel is adjusted, the difference in extrusion pressure before and after the adjustment of the corresponding basic channel shall not exceed 2Mpa; if the extrusion speed of the extrusion channel is adjusted, the extrusion pressure speed before and after the adjustment of the corresponding basic channel shall not exceed 0.1m / min.

[0082] For further information, see Figure 6 , Figure 6 This is a schematic diagram of the control parameter adjustment provided by the embodiment of the present invention. Figure 6 As shown, each control parameter adjustment is a single parameter adjustment, that is, according to the quantum dot distribution uniformity of the corresponding quantum functional film layer, one parameter is selected from the extrusion temperature, extrusion pressure and extrusion speed for adjustment, and according to the quantum dot distribution uniformity of the quantum functional film layer made after the control parameter adjustment, one parameter is selected from the extrusion temperature, extrusion pressure and extrusion speed for adjustment again, until the quantum dot distribution uniformity of the quantum functional film layers on both sides of the red and green structure quantum dot functional board is determined to be uniform, then the adjustment process is stopped and the monitoring process is entered.

[0083] S042. Adjust the extrusion temperature, extrusion pressure or extrusion speed of the second side layer extrusion channel according to the uniformity of the quantum dot distribution on the second side surface.

[0084] The specific adjustment method of the control parameters of the second side layer extrusion channel corresponding to the second side surface can refer to the specific adjustment method of the control parameters of the first side layer extrusion channel corresponding to the first side surface, which will not be repeated here.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents.

Claims

1. A method for preparing a red-green structure quantum dot functional board, characterized in that: The steps include: Setting initial control parameters, wherein the initial control parameters include extrusion temperature, extrusion pressure and extrusion speed of at least one extrusion channel of the multi-layer co-extrusion device; Based on the initial control parameters, the multi-layer co-extrusion device is controlled to prepare a red-green board structure quantum dot functional board, wherein the red-green board structure quantum dot functional board comprises a red light quantum dot functional layer, an intermediate layer and a green light quantum dot functional layer from top to bottom; Respectively obtaining spectrum detection data of both sides of the red and green plate structure quantum dot functional plate, and determining the quantum dot distribution uniformity of the corresponding quantum dot functional layer according to the spectrum detection data; According to the determination result of the uniformity of the quantum dot distribution on both sides of the red-green structure quantum dot functional board, the control parameters of the corresponding extrusion channel are adjusted, and based on the adjusted control parameters, the multilayer co-extrusion device is controlled to prepare the red-green board structure quantum dot functional board; The step of respectively acquiring the spectrum detection data on both sides of the red and green panel structure quantum dot functional panel comprises the following steps: Disposing a first detection light source on a first side of the red-green plate structure quantum dot functional plate, and irradiating the first side with the first detection light source; Disposing a second detection light source on a second side of the red-green plate structure quantum dot functional plate, and irradiating the second side with the second detection light source; A first receiving device is arranged on the first side surface, and the first receiving device is used to receive the first reflected light of the first detection light source on the first side surface, and the first spectrum detection data of the red-green plate structure quantum dot functional board is obtained through the first reflected light; A second receiving device is arranged on the second side surface, and the second receiving device is used to receive the second reflected light of the second detection light source on the second side surface, and the second spectrum detection data of the red-green panel structure quantum dot functional panel is obtained through the first reflected light; The step of respectively acquiring the spectrum detection data on both sides of the red and green panel structure quantum dot functional panel also includes the following steps: Obtaining a first spectral characteristic statistic based on spectral detection data of at least three detection points on the first side, and determining the quantum dot distribution uniformity of the quantum dot functional layer corresponding to the first side based on the first spectral characteristic statistic; Obtaining second spectral characteristic statistics based on spectral detection data of at least three detection points on the second side, and determining the quantum dot distribution uniformity of the quantum dot functional layer corresponding to the second side based on the second spectral characteristic statistics; The uniformity of quantum dot distribution of the quantum dot functional layer corresponding to any side surface satisfies the following judgment rules: When there is a spectral feature standard deviation that exceeds 5% of the corresponding spectral feature average value, the quantum dot distribution uniformity of the quantum dot functional layer corresponding to the side is determined to be non-uniform; otherwise, the quantum dot distribution uniformity of the quantum dot functional layer corresponding to the side is determined to be uniform; The standard deviation of any spectral feature satisfies the following calculation model: ,in, represents the standard deviation of the spectral feature x, , i represents the detection point number, N represents the number of detection points, Represents the spectral characteristic value of the i-th detection point.

2. The method for preparing a red-green structure quantum dot functional board according to claim 1, characterized in that: The multi-layer co-extrusion device is a three-layer co-extrusion device, and the three-layer co-extrusion device includes a first side layer extrusion channel, a middle layer extrusion channel and a second side layer extrusion channel; Among them, the first side layer extrusion channel is used to prepare one of the red light quantum dot functional layer or the green light quantum dot functional layer, the middle layer extrusion channel is used to prepare the middle layer, and the second side layer extrusion channel is used to prepare the red light quantum dot functional layer or the other of the green light quantum dot functional layer.

3. The method for preparing a red-green structure quantum dot functional board according to claim 2, characterized in that: The spectral characteristics include a light intensity peak, a central wavelength corresponding to the light intensity peak, and a peak half-height width.

4. The method for preparing a red-green structure quantum dot functional board according to claim 3, characterized in that: According to the determination result of the uniformity of the quantum dot distribution on both sides of the red and green structure quantum dot functional board, the control parameters of the corresponding extrusion channel are adjusted, including the following control rules: If the standard deviation of the peak light intensity in the quantum dot distribution uniformity determination result on one side exceeds 5% of the average value of the peak light intensity, the extrusion temperature of the corresponding extrusion channel is adjusted; If the standard deviation of the peak light intensity in the quantum x-dot distribution uniformity determination result on one side does not exceed 5% of the average light intensity peak value, but the standard deviation of the central wavelength exceeds 5% of the average central wavelength, the extrusion pressure of the corresponding extrusion channel is adjusted; If the standard deviation of the light intensity peak value in the quantum dot distribution uniformity judgment result on one side does not exceed 5% of the light intensity peak value average value, the standard deviation of the central wavelength does not exceed 5% of the central wavelength average value, but the standard deviation of the peak half-width exceeds 5% of the peak half-width average value, then adjust the extrusion speed of the corresponding extrusion channel.

5. The method for preparing a red-green structure quantum dot functional board according to claim 4, characterized in that: The method of adjusting the control parameters of the corresponding extrusion channel according to the determination result of the uniformity of the quantum dot distribution on both sides of the red and green structure quantum dot functional board also includes the following rules: If the extrusion temperature of the extrusion channel is adjusted, the difference in extrusion temperature before and after the adjustment of the corresponding basic channel shall not exceed 2°C; if the extrusion pressure of the extrusion channel is adjusted, the difference in extrusion pressure before and after the adjustment of the corresponding basic channel shall not exceed 2Mpa; if the extrusion speed of the extrusion channel is adjusted, the extrusion pressure speed before and after the adjustment of the corresponding basic channel shall not exceed 0.1m / min.

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