Blue light blocking diffusion plate

Abstract

This utility model relates to the field of diffuser plate technology, specifically disclosing a blue light blocking diffuser plate, including a substrate. The substrate has a light-incident surface and a light-emitting surface at its upper and lower ends, respectively. A first diffuser coating and a second diffuser coating are coated on the light-incident surface and the light-emitting surface, respectively. A first blue light blocking layer is covered on the second diffuser coating, and a second blue light blocking layer is covered on the first blue light blocking layer. A silver-plated film layer is disposed on the side of the substrate. The thickness of the first blue light blocking layer is 0.15mm-0.35mm, the thickness of the second blue light blocking layer is 0.35mm-0.65mm, and the thickness of the silver-plated film layer is 0.8mm-1mm. This utility model converts some harmful blue light into yellow light by adding a first blue light blocking layer, and then the second blue light blocking layer absorbs most of the remaining harmful blue light, greatly reducing the emitted harmful blue light. Simultaneously, it can alleviate eye fatigue, prevent eye damage, and improve light stability and light display uniformity, thus having a wide range of applications.

Description

Technical Field

[0001] This utility model relates to the field of diffuser plate technology, and in particular to a blue light blocking diffuser plate. Background Technology

[0002] Diffuser plates are used in LCD, LED lighting, and imaging display systems. They utilize the physical phenomena of refraction, reflection, and scattering that occur when light encounters two media with different refractive indices during its journey. By adding inorganic or organic light diffusing agents to substrates such as PMMA, PC, PS, and PP, or by artificially adjusting the light through the array arrangement of micro-feature structures on the substrate surface, the light is refracted, reflected, and scattered in different directions, thereby changing the path of the light and achieving sufficient dispersion of incident light to produce an optical diffusion effect.

[0003] A search revealed that Chinese utility model patent application CN202222169588.6 discloses a diffuser plate, comprising a first diffuser layer and a second diffuser layer, which are integrally formed. The first diffuser layer has embossed diffuser units, convex diffuser units, or concave diffuser units on its side facing away from the second diffuser layer. The second diffuser layer is used to focus light from the light source passing through the first diffuser layer. Light passing through the first diffuser layer undergoes refraction in different directions, changing its path and achieving sufficient scattering of the incident light. The scattered light is then focused by the second diffuser layer before being emitted, thus ensuring efficient utilization of light energy and enhancing display brightness.

[0004] For example, Chinese utility model patent application CN202120642175.8 discloses a composite diffuser plate, including a diffuser substrate, a first light diffuser layer, and a second light diffuser layer. The first light diffuser layer contains first light diffuser particles, and the second light diffuser layer contains second light diffuser particles. The top surface of the second light diffuser layer is provided with multiple microprisms and microlenses of different heights. By embedding blue light filtering particles within the diffuser substrate, harmful blue light (approximately 380nm-450nm wavelength) is blocked. By setting diffuser substrates, first light diffuser particles, and second light diffuser particles with different refractive indices, light continuously refracts, reflects, and scatters within the medium as it passes through, thus producing a good optical diffusion effect. By setting a microstructure array with different heights, light is refracted in different directions as it passes through, changing the light's path and achieving sufficient light dispersion, resulting in a softer and more uniform illumination effect. Simultaneously, the microstructure light diffuser plate has the advantages of high transmittance and high light energy utilization.

[0005] While the existing diffusers can meet basic usage requirements, they emit varying degrees of blue light during use. Blue light is high-energy visible light with a wavelength of 380-495 nanometers, and it is the most energetic light in the visible spectrum. Blue light can penetrate the lens and reach the retina, causing optical damage and accelerating the oxidation of macular cells, which can easily lead to eye fatigue. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a blue light blocking diffuser plate that addresses the above-mentioned defects of the prior art. By adding a first blue light blocking layer, some harmful blue light is converted into yellow light, and then a second blue light blocking layer absorbs most of the remaining harmful blue light, thereby greatly reducing the emitted harmful blue light. At the same time, it can relieve eye fatigue, prevent eye damage, and improve light stability and light display uniformity, and has a wide range of applications.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0008] A blue light blocking diffuser includes a substrate. A light-incident surface and a light-exit surface are respectively disposed at the upper and lower ends of the substrate. A first diffusion coating and a second diffusion coating are respectively coated on the light-incident surface and the light-exit surface. A first blue light blocking layer is covered on the second diffusion coating, and a second blue light blocking layer is covered on the first blue light blocking layer. A silver plating layer is disposed on the side of the substrate. The thickness of the first blue light blocking layer is 0.15mm-0.35mm, the thickness of the second blue light blocking layer is 0.35mm-0.65mm, and the thickness of the silver plating layer is 0.8mm-1mm.

[0009] Preferably, the silver coating layer is disposed around each side edge of the substrate.

[0010] Preferably, the thickness of the substrate is 1mm-3mm, and the thickness of the first diffusion coating and the thickness of the second diffusion coating are both 0.5mm-0.6mm.

[0011] Preferably, the first blue light blocking layer is composed of a mixture of transparent acrylic resin and fluorescent yellow.

[0012] Preferably, the second blue light blocking layer is composed of a mixture of UV-curable polycarbonate and nano-rare earth oxides.

[0013] Preferably, both the first diffusion coating and the second diffusion coating are printed on the entire substrate, and the thickness of the first blue light blocking layer gradually decreases from the edge of the substrate inward.

[0014] By adopting the above technical solution, the blue light blocking diffuser provided by this utility model has the following beneficial effects: The substrate of the blue light blocking diffuser has a light-incident surface and a light-emitting surface at its upper and lower ends, respectively. A first diffusion coating and a second diffusion coating are coated on the light-incident surface and the light-emitting surface, respectively. A first blue light blocking layer is covered on the second diffusion coating, and a second blue light blocking layer is covered on the first blue light blocking layer. A silver plating layer is provided on the side of the substrate. The thickness of the first blue light blocking layer is 0.15mm-0.35mm, the thickness of the second blue light blocking layer is 0.35mm-0.65mm, and the thickness of the silver plating layer is 0.8mm-1mm. By adding the first blue light blocking layer, some harmful blue light is converted into yellow light, and then the second blue light blocking layer absorbs most of the remaining harmful blue light, greatly reducing the emitted harmful blue light. This also relieves eye fatigue, prevents eye damage, and improves light stability and light display uniformity, making it widely applicable. Attached Figure Description

[0015] Figure 1 This is an exploded view of the present invention;

[0016] Figure 2 This is a longitudinal sectional view of the present invention;

[0017] In the figure, 1-substrate, 2-first diffusion coating, 3-second diffusion coating, 4-first blue light protection layer, 5-second blue light protection layer, 6-silver plating layer. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] like Figure 1-2 As shown, the blue light blocking diffuser includes a substrate 1. The upper and lower ends of the substrate 1 are respectively provided with a light-incident surface and a light-exit surface. The light-incident surface and the light-exit surface are respectively coated with a first diffusion coating 2 and a second diffusion coating 3. The second diffusion coating 2 is covered with a first blue light blocking layer 4, and the first blue light blocking layer 4 is covered with a second blue light blocking layer 5. A silver plating layer 6 is provided on the side of the substrate 1. The thickness of the first blue light blocking layer 4 is 0.15mm-0.35mm, the thickness of the second blue light blocking layer 6 is 0.35mm-0.65mm, and the thickness of the silver plating layer 6 is 0.8mm-1mm. Understandably, the first blue light blocking layer 4 is composed of a mixture of transparent acrylic resin and fluorescent yellow, and the second blue light blocking layer 5 is composed of a mixture of UV-curable polycarbonate and nano-rare earth oxides, the nano-rare earth oxides being mainly composed of CeO2, La2O3 and Y2O3; the substrate 1 can be made of PC material, etc.; the first diffusion coating 2 and the second diffusion coating 3 can be made of polystyrene, or polycarbonate, or polypropylene, or polymethyl methacrylate, or polyethylene naphthalate, or polyethylene terephthalate.

[0022] Specifically, the silver coating layer 6 is disposed around each side edge of the substrate 1. The silver coating layer 6 can prevent light leakage at the edges and also has the function of isolating water and oxygen. The thickness of the substrate 1 is 1mm-3mm, and the thickness of the first diffusion coating 2 and the second diffusion coating 3 are both 0.5mm-0.6mm. The first diffusion coating 2 and the second diffusion coating 3 are printed on the whole board. The thickness of the first blue light blocking layer 4 gradually decreases from the edge of the substrate to the inside. The fluorescent yellow and other substances in the first blue light blocking layer 4 can convert a small amount of blue light into yellow light. The small amount of yellow light at the edge will not affect the color of the light or the optical effect of the diffusion plate, thus achieving the purpose of preventing blue light leakage.

[0023] Understandably, this utility model has a reasonable design and unique structure. By adding a first blue light blocking layer 4, some harmful blue light is converted into yellow light, and then the second blue light blocking layer 5 absorbs most of the remaining harmful blue light, which greatly reduces the emitted harmful blue light. At the same time, it can relieve eye fatigue, prevent eye damage, and improve light stability and light display uniformity, and has a wide range of applications.

[0024] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A blue light blocking diffuser plate, comprising a substrate, wherein a light-incident surface and a light-emitting surface are respectively disposed at the upper and lower ends of the substrate, and a first diffusion coating and a second diffusion coating are respectively coated on the light-incident surface and the light-emitting surface, characterized in that: The second diffusion coating is covered with a first blue light blocking layer, the first blue light blocking layer is covered with a second blue light blocking layer, and a silver plating layer is disposed on the side of the substrate. The thickness of the first blue light blocking layer is 0.15mm-0.35mm, the thickness of the second blue light blocking layer is 0.35mm-0.65mm, and the thickness of the silver plating layer is 0.8mm-1mm.

2. The blue light blocking diffuser plate according to claim 1, characterized in that: The silver coating layer is disposed around each side edge of the substrate.

3. The blue light blocking diffuser plate according to claim 1, characterized in that: The thickness of the substrate is 1mm-3mm, and the thickness of both the first diffusion coating and the second diffusion coating is 0.5mm-0.6mm.

4. The blue light blocking diffuser plate according to claim 1, characterized in that: Both the first diffusion coating and the second diffusion coating are printed on the entire board, and the thickness of the first blue light blocking layer gradually decreases from the edge of the substrate to the inside.

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