A manufacturing process for a direct down glass-based QD diffuser plate

Abstract

The application belongs to the technical field of glass diffusion plates, and particularly relates to a manufacturing process of a direct type glass-based QD diffusion plate. The manufacturing process of the direct type glass-based QD diffusion plate comprises the following steps: step one: comprising a glass substrate, glue-dots are formed on the side edges of the four sides of the glass substrate, and the glue-dotted side edges are formed after UV curing; step two: glue-dots are formed on the glue-dotted side edges, and glue-dotted dams are formed after UV curing; step three: a QD diffusion glue layer is coated on the glass substrate by using a slit coating process; step four: a second glass layer is attached to the surface of the QD diffusion glue layer, the second glass layer is supported by the glue-dotted dams, a QD diffusion coating layer with a thickness of 60-70 microns is formed between the glass substrate and the second glass layer, and then UV curing is performed. The manufacturing process of the direct type glass-based QD diffusion plate has the effects of self-leveling on the glass substrate and surface flatness.

Description

Technical Field

[0001] This invention belongs to the technical field of glass diffusion plates, specifically relating to a manufacturing process for a direct-down glass-based QD diffusion plate. Background Technology

[0002] Glass substrate is a thin glass sheet with an extremely flat surface and is one of the key basic materials in the flat panel display industry.

[0003] A quantum dot (QD) is a semiconductor nanostructure in which excitons are bound together in three spatial directions. Sometimes referred to as "artificial atoms" or "quantum dot atoms," it is a new concept proposed in the 1990s. This confinement can be attributed to electrostatic potential (generated by external electrodes, doping, strain, or impurities), the interface between two different semiconductor materials (e.g., in self-assembled quantum dots), the surface of a semiconductor (e.g., semiconductor nanocrystals), or a combination of all three. Quantum dots possess a discrete, quantized energy spectrum. The corresponding wavefunction is spatially located within the quantum dot but extends over several lattice periods. A quantum dot has a small number (1-100) of electrons, holes, or electron-hole pairs, meaning its charge is an integer multiple of the elementary charge.

[0004] QD diffusion plates have advantages such as high color gamut, rich colors, and high color saturation. Currently, the most widely used QD diffusion plates on the market are QD film materials combined with organic plastic diffusion plates or QD particles encapsulated in organic plastic diffusion plates. However, organic plastic materials are often not resistant to high temperatures and have poor water and oxygen barrier effects. After long-term use, QD is prone to failure. Furthermore, the edges of the QD film material are exposed to the air and will also be corroded by water and oxygen over time, forming a wide failure edge, which affects the display screen effect. Summary of the Invention

[0005] The purpose of this invention is to provide a manufacturing process for a direct-lit glass-based QD diffusion plate to solve the technical problems that QD is prone to failure after long-term use, and that the edges of the QD film material are exposed to air and will be corroded by water and oxygen over time, forming a wide failure edge, which affects the display screen effect. The invention aims to achieve the advantages of uniform diffusion coating, no failure edge, and high temperature resistance.

[0006] To address the aforementioned technical problems, this invention provides a manufacturing process for a direct-lit glass-based QD diffusion plate, comprising:

[0007] Step 1: Including the glass substrate, apply adhesive to the sides around the glass substrate, and form the adhesive-coated sides after UV curing.

[0008] Step 2: Apply adhesive to the side of the adhesive application area, and after UV curing, form an adhesive dam.

[0009] Step 3: Apply a QD diffusion adhesive layer to the glass substrate using a slot coating process;

[0010] Step 4: A second glass layer is bonded to the surface of the QD diffusion adhesive layer. The second glass layer is supported by the adhesive dam. A QD diffusion coating is formed between the glass substrate and the second glass layer, and then UV cured.

[0011] Step 5: Apply adhesive to the side of the second glass layer. The adhesive application area includes the side of the glass substrate, the adhesive dam, and the side of the second glass substrate. Then cure with UV.

[0012] Furthermore, in step one, the width of the adhesive dispensing edge is 0.5-1 mm.

[0013] Furthermore, in step two, the height of the adhesive-coated dam is 60-70 micrometers.

[0014] Furthermore, in step three, the QD diffusion adhesive layer is UV cured, the adhesive viscosity is 200-500 rpm, and the coating thickness of the QD diffusion adhesive layer is 60-70 micrometers.

[0015] The beneficial effects of this invention are:

[0016] 1. By using adhesive dams, the QD diffusion adhesive can be surrounded and allowed to self-level, forming a QD diffusion coating. The sides of the QD diffusion adhesive layer are fixed, ensuring a uniform QD diffusion coating and preventing it from contacting air, thus extending the lifespan of the QD diffusion plate and eliminating any failed edges.

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the manufacturing process of the direct-down glass-based QD diffuser plate of the present invention;

[0020] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0021] In the picture:

[0022] 1. Glass substrate;

[0023] 2. Apply adhesive to the side;

[0024] 3. Apply adhesive to create a dam;

[0025] 4. QD diffusion adhesive layer;

[0026] 5. Second glass layer;

[0027] 6. Apply adhesive to seal the edges. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example:

[0030] like Figures 1 to 2 As shown, a manufacturing process for a direct-lit glass-based QD diffusion plate includes: Step 1: including a glass substrate 1, applying adhesive to the sides around the glass substrate 1, and forming adhesive-coated side edges 2 after UV curing, wherein the width of the adhesive-coated side edges 2 is 0.5-1 mm.

[0031] Step 2: Apply adhesive to the adhesive side 2. After UV curing, an adhesive dam 3 is formed, with a height of 60-70 micrometers.

[0032] Step 3: Apply QD diffusion adhesive layer 4 to the glass substrate 1 using a slot coating process. QD diffusion adhesive layer 4 is UV cured, with an adhesive viscosity of 200-500 rpm and a coating thickness of 60-70 micrometers. The slot coating process involves extruding the QD diffusion adhesive layer 4 through the slots of the coating mold under specific pressure and flow rate, transferring it onto the glass substrate 1. This process offers advantages such as high coating speed, high precision, and uniform film thickness. Furthermore, the closed coating system prevents contaminants from entering during the coating process, resulting in high slurry utilization, stable slurry properties, and the ability to perform multi-layer coatings simultaneously. Coating is achieved through controlled rate, precise metering, and pumping of the process fluid. During the coating process, the coating mold moves precisely relative to the substrate.

[0033] Step 4: A second glass layer 5 is bonded to the surface of the QD diffusion adhesive layer 4. The second glass layer 5 is supported by the adhesive dam 3. A QD diffusion coating is formed between the glass substrate 1 and the second glass layer 5, and then UV cured. Step 5: Adhesive is applied to the side of the second glass layer 5 to form an adhesive sealing edge 6. The adhesive sealing edge 6 includes the side of the glass substrate 1, the adhesive dam 3, and the side of the second glass substrate 1, and then UV cured. In this embodiment, the adhesive coverage includes the side of the glass substrate 1, the adhesive dam 3, and the side of the second glass substrate 1, thereby connecting the glass substrate 1, the adhesive dam 3, and the second glass substrate 1, improving the connection stability between the glass substrate 1, the adhesive dam 3, and the second glass substrate 1. Furthermore, this adhesive application also covers the adhesive dam 3.

[0034] In summary: By using the adhesive dam 3, the QD diffusion adhesive can be surrounded and allowed to self-level, forming a QD diffusion coating. Furthermore, by fixing the sides of the QD diffusion adhesive layer 4, the QD diffusion coating can be made uniform and completely covered, preventing it from contacting the air, thus extending the service life of the QD diffusion plate and eliminating any failure edges.

[0035] All the devices selected in this application are general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0036] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A manufacturing process for a direct-down glass-based QD diffuser plate, characterized in that, include: Step 1: Including a glass substrate (1), adhesive is applied to the sides around the glass substrate (1), and after UV curing, adhesive side (2) is formed. Step 2: Apply adhesive to the side (2) of the adhesive application, and after UV curing, form an adhesive dam (3); Step 3: Apply QD diffusion adhesive layer (4) to the glass substrate (1) using a slot coating process; Step 4: A second glass layer (5) is attached to the surface of the QD diffusion adhesive layer (4). The second glass layer (5) is supported by the adhesive dam (3). A QD diffusion coating is formed between the glass substrate (1) and the second glass layer (5), and then cured with UV. Step 5: Apply adhesive to the side of the second glass layer (5). The adhesive application area includes the side of the glass substrate (1), the adhesive dam (3), and the side of the second glass substrate (1). Then cure with UV.

2. The manufacturing process of a direct-lit glass-based QD diffuser plate as described in claim 1, characterized in that, In step one, the width of the adhesive side (2) is 0.5-1 mm.

3. The manufacturing process of a direct-lit glass-based QD diffuser plate as described in claim 2, characterized in that, In step two, the height of the adhesive-coated dam (3) is 60-70 micrometers.

4. The manufacturing process of a direct-lit glass-based QD diffuser plate as described in claim 3, characterized in that, In step three, the QD diffusion adhesive layer (4) is UV cured, the adhesive viscosity is 200-500 rpm, and the coating thickness of the QD diffusion adhesive layer (4) is 60-70 micrometers.

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