A high-precision hot-pressed light guide plate

Abstract

This utility model relates to the field of hot-pressed light guide plate technology, and more particularly to a high-precision hot-pressed light guide plate, comprising a light guide plate body. The light-emitting surface of the light guide plate body is provided with light-guiding dots. The four sides of the light guide plate body are coated with a metal reflective layer and a sealant layer layer from the inside out. A reinforcing frame is adhered to the outside of the sealant layer. This utility model guides light to refract in a specific direction by setting isosceles trapezoidal guiding dots, reducing the problem of light from the top light-incoming area directly scattering to the edge. By setting strip-shaped focusing dots, the light that was originally scattered outward is redirected to the center of the light guide plate body, thereby improving the light emission efficiency at the edge of the light guide plate body, increasing edge brightness, and avoiding edge dark bands and glare. The sealant layer seals the edge of the light guide plate body to prevent moisture from entering the light guide plate body, and the reinforcing frame strengthens the edge strength of the light guide plate body and improves its impact resistance.

Description

Technical Field

[0001] This utility model relates to the field of hot-pressed light guide plate technology, and in particular to a high-precision hot-pressed light guide plate. Background Technology

[0002] Light guide plates, as core optical components that transform line light sources into uniform surface light sources, are widely used in LCD displays, lighting equipment, outdoor advertising screens, and other fields. High-precision hot-pressed light guide plates, with their high dot replication accuracy achieved through hot-pressing technology, offer significant advantages in light uniformity and ultra-thinness, making them a mainstream development trend.

[0003] However, existing products have significant performance shortcomings: First, severe light scattering occurs at the edges of the non-light-incoming side. Due to the lack of a dedicated control structure, light escapes, forming "dark bands at the edges" and "scattered glare," with a brightness difference of 15%-20% between the edges and the center. Second, the edges of the hot-pressed light guide plate are stress concentration areas. With only simple grinding or film application, the edges have poor impact resistance during daily transportation, installation, debugging, or accidental drops. Furthermore, insufficient edge sealing allows moisture and dust to penetrate through gaps in high-humidity and dusty environments, causing the substrate to hydrolyze and age, resulting in yellowing at the edges and a decrease in light transmittance of 8%-10%. Dust adhesion also exacerbates abnormal light scattering. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a high-precision hot-pressed light guide plate, which solves the technical problems of severe light scattering on the non-light-incoming edge of existing hot-pressed light guide plates, weak edge structure resistance to damage, and high risk of sealing and protection failure.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-precision hot-pressed light guide plate, comprising a light guide plate body, wherein the light-emitting surface of the light guide plate body is provided with light guide dots, and the four sides of the light guide plate body are coated with a metal reflective layer and a sealant layer from the inside to the outside, and a reinforced frame is adhered to the outside of the sealant layer.

[0006] A further improvement is that the light guide dots include guiding dots disposed on the light-emitting surface of the light guide dots, and focusing dots are disposed at the bottom and on both sides of the light-emitting surface of the light guide dots.

[0007] A further improvement is that the guiding dots are isosceles trapezoidal structures, and they are arranged in a dot pattern from top to bottom of "reducing the spacing, increasing the number - increasing the spacing, decreasing the number - reducing the spacing, and increasing the number again", with the area of ​​the guiding dots in the middle being larger than the area of ​​the guiding dots on both sides.

[0008] A further improvement is that the light-gathering dots are strip-shaped, and their long axis is parallel to the side of the adjacent light guide plate body.

[0009] A further improvement is that the metal reflective layer is made of aluminum or silver, the sealant layer is made of UV-curable adhesive, and the reinforcing frame is made of polycarbonate.

[0010] A further improvement is that the light-emitting surface of the light guide plate body is provided with a polycarbonate hardening layer, and the non-light-emitting surface of the light guide plate body is provided with a glass fiber reinforcement layer.

[0011] By employing the above technical solution, this utility model provides a high-precision hot-pressed light guide plate, which has at least the following beneficial effects:

[0012] 1. This utility model guides light entering from the top of the light guide plate body through light guide dots, improving the light emission uniformity of the light guide plate body and avoiding the problem of local over-brightness or local dimness. The metal reflective layer reflects the edge light to avoid scattering and glare at the edge of the light guide plate body. The sealing adhesive layer seals the edge of the light guide plate body to prevent moisture from entering the light guide plate body. The reinforced frame strengthens the edge strength of the light guide plate body and improves its drop resistance.

[0013] 2. This utility model guides light to refract in a specific direction by setting up isosceles trapezoidal guide dots, reducing the problem of light scattering directly from the top light-entry area to the edge. It also adopts a dot arrangement method of "reducing the spacing and increasing the number - increasing the spacing and decreasing the number - reducing the spacing and increasing the number again" to adapt to the characteristic that light attenuates as the propagation distance increases. The design of increasing the spacing and decreasing the number in the middle and then increasing it again can balance the light distribution in the middle and bottom.

[0014] 3. This utility model, by setting up a light-focusing mesh with a strip structure, redirects the light that was originally scattered outward to the center of the light guide plate body, thereby improving the light output efficiency at the edge of the light guide plate body, increasing the edge brightness, and avoiding edge dark bands and scattered glare.

[0015] 4. This utility model combines the polycarbonate hardening layer with the light guide plate substrate through a hot pressing process, which improves the scratch resistance of the light guide plate surface and reduces the failure of light guide dots caused by wear. The glass fiber reinforcement layer can increase the impact strength of the substrate by more than 30%, reduce the risk of breakage during transportation or installation, and reduce warping deformation under high temperature environment. Attached Figure Description

[0016] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a top-view structural diagram of the light guide plate body of this utility model;

[0020] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0021] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B.

[0022] In the image: 1. Light guide plate body;

[0023] 2. Light guiding dots; 21. Guiding dots; 22. Focusing dots;

[0024] 3. Metal reflective layer; 4. Sealant layer; 5. Reinforced frame; 6. Polycarbonate hardened layer; 7. Fiberglass reinforcement layer. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Addressing the issues of severe light scattering on the non-light-incoming edge of existing hot-pressed light guide plates, weak edge structure resistance, and high risk of sealing failure, this embodiment provides a high-precision hot-pressed light guide plate. By optimizing the dot layout and enhancing the edge strength of the light guide plate, it avoids the problems of edge scattering and weak edge resistance, and improves the sealing performance of the light guide plate edges to prevent moisture infiltration, which could lead to aging and yellowing of the light guide plate substrate. Please refer to... Figures 1-4 This high-precision hot-pressed light guide plate includes a light guide plate body 1. The light-emitting surface of the light guide plate body 1 is provided with light guide dots 2. The four sides of the light guide plate body 1 are coated with a metal reflective layer 3 and a sealant layer 4 from the inside out. A reinforcing frame 5 is adhered to the outside of the sealant layer 4. The light guide dots 2 guide the light entering from the top of the light guide plate body 1, improve the light emission uniformity of the light guide plate body 1, and avoid the problem of local over-brightness or local dimness. The metal reflective layer 3 reflects the edge light to avoid glare and scattering at the edges of the light guide plate body 1. The sealant layer 4 seals the edges of the light guide plate body 1 to prevent moisture from entering the light guide plate body 1. The reinforcing frame 5 strengthens the edge strength of the light guide plate body 1 and improves its impact resistance.

[0027] Furthermore, the light guide dot 2 includes guiding dots 21 disposed on the light-emitting surface of the light guide dot 2, and focusing dots 22 are disposed at the bottom and both sides of the light-emitting surface of the light guide dot 2. The guiding dots 21 guide the light from the top light-inlet side of the light guide plate body 1 to the entire light-emitting surface of the light guide plate body 1. The setting of the focusing dots 22 avoids the problems of dark bands and scattered glare at the edges of the light guide plate body 1.

[0028] To optimize light propagation in the light guide plate 1 and ensure consistent brightness, the guiding dots 21 in this device are isosceles trapezoidal structures. They are arranged in a pattern of "reduced spacing, increased quantity - increased spacing, decreased quantity - reduced spacing, increased quantity again" from top to bottom. The area of ​​the guiding dots 21 in the middle is larger than that of the guiding dots 21 on both sides. The isosceles trapezoidal structure allows the guiding dots 21 to refract light in a specific direction using the trapezoidal slope, reducing the problem of light scattering directly from the top light-intake area to the edge. The decreasing spacing and increasing quantity of the trapezoids from the top to the bottom of the light guide plate 1 accommodates the attenuation of light as the propagation distance increases. The design of increasing spacing, decreasing quantity, and then increasing quantity again in the middle balances the light distribution in the middle and bottom. The light in the middle tends to be uniform after initial scattering, and reducing the number of trapezoids avoids brightness loss due to excessive scattering. Increasing the quantity again near the bottom strengthens the concentrated emission of light from the bottom, compensating for energy attenuation at the end of the light propagation.

[0029] To avoid problems such as edge dark bands and glare caused by light escaping from the edge of the light guide plate body 1, the focusing dots 22 in this device are strip-shaped, and their long axis is parallel to the side of the adjacent light guide plate body 1. The strip-shaped dots scatter edge light in a directional manner, redirecting the light that was originally scattered outward to the center of the light guide plate body 1, thereby improving the light output efficiency at the edge of the light guide plate body 1, increasing the edge brightness, and avoiding edge dark bands and glare.

[0030] Furthermore, the metal reflective layer 3 is made of aluminum or silver, the sealant layer 4 is made of UV-curable adhesive, and the reinforcing frame 5 is made of polycarbonate. The aluminum or silver metal reflective layer 3 improves the reflectivity, avoids glare and light scattering at the edges of the light guide plate body 1, improves light utilization, and indirectly enhances the overall brightness. The sealant layer 4, made of UV-curable adhesive, provides waterproof and moisture-proof properties, preventing moisture intrusion and aging of the substrate. The reinforcing frame 5 wraps around the light guide plate body 1, improving the edge impact resistance of the light guide plate body 1.

[0031] To further improve the scratch and impact resistance of the light guide plate body 1, a polycarbonate hardening layer 6 is provided on the light-emitting surface of the light guide plate body 1, and a glass fiber reinforcement layer 7 is provided on the non-light-emitting surface of the light guide plate body 1. The polycarbonate hardening layer 6 is bonded to the substrate of the light guide plate body 1 through a hot pressing process, which improves the scratch resistance of the surface of the light guide plate body 1 and reduces the failure of the light guide dots 2 caused by wear. The glass fiber reinforcement layer 7 can increase the impact strength of the substrate by more than 30%, reduce the risk of breakage during transportation or installation, and reduce warping deformation under high temperature environment.

[0032] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision hot-pressing light guide plate comprising a light guide plate body (1), characterized in that: The light guide plate body (1) has light guide dots (2) on its light-emitting surface. The light guide plate body (1) is coated with a metal reflective layer (3) and a sealant layer (4) layer by layer from the inside to the outside. A reinforced frame (5) is attached to the outside of the sealant layer (4). The light guide dot (2) includes a guiding dot (21) disposed on the light-emitting surface of the light guide dot (2), and a focusing dot (22) is disposed at the bottom and on both sides of the light-emitting surface of the light guide dot (2). The guide points (21) are isosceles trapezoidal structures, and they are arranged in a pattern of "reducing the spacing, increasing the number - increasing the spacing, decreasing the number - reducing the spacing, increasing the number again" from top to bottom. The area of ​​the guide points (21) in the middle is larger than the area of ​​the guide points (21) on both sides.

2. The high-precision hot-pressing light guide plate according to claim 1, characterized in that: The light-gathering dots (22) are strip-shaped structures, and their long axis is parallel to the side of the adjacent light guide plate body (1).

3. The high-precision hot-pressed light guide plate according to claim 1, characterized in that: The metal reflective layer (3) is made of aluminum or silver, the sealant layer (4) is made of UV-curable adhesive, and the reinforced frame (5) is made of polycarbonate.

4. The high-precision hot-pressed light guide plate according to claim 1, characterized in that: The light guide plate body (1) has a polycarbonate hardening layer (6) on the light-emitting surface and a glass fiber reinforcement layer (7) on the non-light-emitting surface.

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