Method for improving brightness of glass diffusion plate

Abstract

The present application belongs to the technical field of glass diffusion plate, and particularly relates to a method for improving the brightness of a glass diffusion plate, which comprises the following steps: step one: cutting glass into a glass substrate; step two: printing a diffusion coating on the upper and lower surfaces of the glass substrate, the printing screen mesh number being 300 meshes, and the printing thickness being 8-10 microns; in step two, the diffusion coating is composed of a first ink and a second ink in a weight ratio of 1:1; the first ink comprises 50-60 wt% titanium dioxide with a particle diameter of 3 microns; and the second ink comprises 20-25% titanium dioxide and 15-20% silicon dioxide. The method for improving the brightness of a glass diffusion plate improves the light transmittance of the diffusion coating by changing the particle diameter and component ratio of the diffusion ink, while ensuring the shielding effect and diffusion effect of the diffusion coating, so as to improve the overall brightness of the glass diffusion plate.

Description

Technical Field

[0001] This invention belongs to the technical field of glass diffuser plates, and specifically relates to a method for improving the brightness of a glass diffuser plate. Background Technology

[0002] Compared to plastic diffusers, glass diffusers have advantages such as high thermal stability, low coefficient of expansion, and long service life. To reduce costs, ordinary soda-lime glass is commonly used for glass diffusers, which has a high iron content. Its overall light transmittance is about 2% lower than that of plastic materials of the same thickness, such as PMMA, PS, and PC. The diffusing material in glass diffusers is usually prepared by coating a diffusion coating on the surface, while plastic diffusers are filled with diffusion particles inside. Filling with diffusion particles inside can achieve better diffusion and shielding effects. Therefore, to achieve the same diffusion and shielding effect, the overall brightness of glass diffusers is 10-20% lower than that of plastic diffusers. Summary of the Invention

[0003] The purpose of this invention is to provide a method for improving the brightness of a glass diffuser plate, in order to solve the technical problem that after the finished diffuser plate is manufactured, the overall brightness of the glass diffuser plate is 10-20% lower than that of the plastic diffuser plate in order to achieve the same diffusion and shielding effect. By changing the particle size and composition ratio of the diffusion ink, the light transmittance of the diffusion coating is improved, while ensuring the shielding and diffusion effects of the diffusion coating, thereby achieving the goal of improving the overall brightness of the glass diffuser plate.

[0004] To address the aforementioned technical problems, this invention provides a method for improving the brightness of a glass diffuser plate, comprising the following steps:

[0005] Step 1: Cut the glass into glass substrates;

[0006] Step 2: Print a diffusion coating on the upper and lower surfaces of the glass substrate. The screen mesh size is 300, and the printing thickness is 8-10μm.

[0007] In step two, the diffusion coating consists of a first ink and a second ink with a weight ratio of 1:1;

[0008] The first ink comprises: 50-60 wt% titanium dioxide with a particle diameter of 3 micrometers;

[0009] The second ink comprises 20-25% titanium dioxide and 15-20% silicon dioxide.

[0010] Furthermore, the surface roughness Ra of the diffusion coating is 1.56-1.92 μm, with a light transmittance of 47-53% after printing.

[0011] Furthermore, in step two, the average diameter of the titanium dioxide particles in the first ink is 3 micrometers.

[0012] Furthermore, in step two, the titanium dioxide particles in the first ink have an average diameter of 5-6 micrometers, and the silicon dioxide particles have an average diameter of 3 micrometers.

[0013] The beneficial effects of this invention are:

[0014] 1. By changing the particle size and composition ratio of the diffusion ink, the light transmittance of the diffusion coating is improved, while ensuring the shielding and diffusion effects of the diffusion coating, thereby achieving the goal of improving the overall brightness of the glass diffusion plate.

[0015] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below. Detailed Implementation

[0016] 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. 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.

[0017] Example:

[0018] A method for improving the brightness of a glass diffuser plate includes the following steps: Step 1: Cutting the glass into a glass substrate; Step 2: Printing a diffusion coating on the upper and lower surfaces of the glass substrate, with a printing screen mesh of 300 mesh and a printing thickness of 8-10 μm; In Step 2, the diffusion coating is composed of a first ink and a second ink with a weight ratio of 1:1.

[0019] The first ink comprises 50-60 wt% titanium dioxide with a particle diameter of 3 micrometers; the second ink comprises 20-25% titanium dioxide and 15-20% silicon dioxide. The titanium dioxide particles in the first ink have an average particle diameter of 3 micrometers.

[0020] In this embodiment, the surface roughness Ra of the diffusion coating is 1.56-1.92 μm, resulting in a light transmittance of 47-53% after printing. The titanium dioxide particles in the first ink have an average diameter of 5-6 micrometers, and the silicon dioxide particles have an average diameter of 3 micrometers.

[0021] In this embodiment, the first ink may be of type 1203C, but is not limited to type 1203C, and the second ink may be of type 1601, but is not limited to type 1601. Compared to the smaller titanium dioxide diffusion particles in 1203C ink, the large titanium dioxide diffusion particles in 1601 ink improve both diffusion and masking effects. The large silica particles in 1601 have a low refractive index and lower density (silica density 2.2 g / cm³, titanium dioxide density 3.9-4.2 g / cm³). After printing the diffusion coating, during the wet film flow, the large silica particles float to the surface, increasing the surface roughness of the coating and enhancing its diffusion effect. This also improves the overall light transmittance of the film. Therefore, 1601 ink has equivalent masking and diffusion effects to 1203C ink, but with higher light transmittance. When 1601 ink is applied alone to a glass surface, the larger diffusion particles reduce adhesion between the coating and the glass, affecting the mechanical properties of the diffusion coating. In contrast, the smaller diffusion particles in 1203C ink result in higher adhesion to glass. When the two are mixed in a 1:1 ratio, the resulting diffusion coating exhibits better optical and mechanical properties.

[0022] In summary, by changing the particle size and composition ratio of the diffusion ink, the light transmittance of the diffusion coating can be improved, while ensuring the shielding and diffusion effects of the diffusion coating, thereby achieving the goal of improving the overall brightness of the glass diffusion plate.

[0023] Example:

[0024] The glass diffuser plate was made using 1.1t of ordinary soda-lime glass. It was coated with a 1203C+1601 mixed ink on both sides in a 1:1 ratio. Then, OCA optical adhesive and DBEF optical film were sequentially bonded to the surface of the upper diffuser coating. Its optical and mechanical properties were tested in conjunction with a backlight module.

[0025] Comparative Example 1:

[0026] The glass diffuser plate was made using 1.1t ordinary soda-lime glass, with 1203C ink printed on both sides. OCA optical adhesive and DBEF optical film were then sequentially bonded to the surface of the upper diffuser coating. Its optical and mechanical properties were then tested in conjunction with a backlight module.

[0027] Comparative Example 2:

[0028] The glass diffuser plate was made using 1.1t ordinary soda-lime glass, with 1601 ink printed on both sides. OCA optical adhesive and DBEF optical film were then sequentially bonded to the surface of the upper diffuser coating. Its optical and mechanical properties were then tested in conjunction with a backlight module.

[0029]

[0030] In the embodiment, the brightness of the glass diffuser plate is increased by 10.1% compared with that of Comparative Example 1, the light transmittance is increased by 9.3%, and the uniformity and adhesion are basically the same as those of Comparative Example 1. However, although the brightness of Comparative Example 2 is the highest, the adhesion is reduced and cannot meet the mechanical strength requirements of the glass diffuser plate.

[0031] 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.

[0032] 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.

[0033] 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 method for improving the brightness of a glass diffuser plate, characterized in that, Includes the following steps: Step 1: Cut the glass into glass substrates; Step 2: Print a diffusion coating on the upper and lower surfaces of the glass substrate. The printing screen has a mesh size of 300 and a printing thickness of 8-10 μm. In step two, the diffusion coating consists of a first ink and a second ink with a weight ratio of 1:1; The first ink comprises: 50-60 wt% titanium dioxide; The second ink comprises: 20-25% titanium dioxide and 15-20% silicon dioxide; In step two, the average diameter of titanium dioxide particles in the first ink is 3 micrometers; In step two, the titanium dioxide particles in the first ink have an average diameter of 5-6 micrometers, and the silicon dioxide particles have an average diameter of 3 micrometers.

2. The method for improving the brightness of a glass diffuser plate as described in claim 1, characterized in that, The surface roughness Ra of the diffusion coating is 1.56-1.92 μm, and the light transmittance after printing is 47-53%.

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