CN117865503A - Method for improving brightness of glass diffusion plate - Google Patents

Abstract

The invention belongs to the technical field of glass diffusion plates, and particularly relates to a method for improving the brightness of a glass diffusion plate, which comprises the following steps: step one: cutting the glass into glass substrates; step two: printing diffusion coating on the upper and lower surfaces of the glass substrate, wherein the number of the printing screen is 300, and the printing thickness is 8-10 mu m; in the second step, the diffusion coating is composed of a first ink and a second ink in a weight ratio of 1:1; the first ink includes: 50-60wt% of titanium dioxide, the particle diameter being 3 microns; the second ink includes: 20-25% of titanium dioxide and 15-20% of silicon dioxide. The method for improving the brightness of the glass diffusion plate improves the light transmittance of the diffusion coating by changing the particle size and the component proportion of the diffusion ink, and simultaneously ensures the shielding effect and the diffusion effect of the diffusion coating, thereby achieving the effect of improving the overall brightness of the glass diffusion plate.

Description

A method for improving the brightness of a glass diffusion plate

Technical Field

The invention belongs to the technical field of glass diffusion plates, and in particular relates to a method for improving the brightness of a glass diffusion plate.

Background technique

Compared with plastic diffusers, glass diffusers have the advantages of high thermal stability, low expansion coefficient, and long service life. In order to reduce costs, ordinary soda-lime glass is often used as glass diffusers, which has a higher iron content. The overall light transmittance is about 2% lower than that of plastic materials of the same thickness, such as PMMA, PS, PC, etc. The diffusion material of the glass diffuser is usually prepared by applying a diffusion coating on the surface, while the plastic diffuser is filled with diffusion particles inside. Filling the interior with diffusion particles can achieve better diffusion and shielding effects. Therefore, after the finished diffuser is made, to achieve the same diffusion and shielding effects, the overall brightness of the glass diffuser is 10-20% lower than that of the plastic diffuser.

Summary of the invention

The purpose of the present invention is to provide a method for improving the brightness of a glass diffuser plate to solve the technical problem that after the finished diffuser plate is made, in order to achieve the same diffusion and shielding effects, the overall brightness of the glass diffuser plate is 10-20% lower than that of the plastic diffuser plate. By changing the particle size and component ratio of the diffusion ink, the transmittance of the diffusion coating is improved, and at the same time the shielding effect and diffusion effect of the diffusion coating are guaranteed, the purpose of improving the overall brightness of the glass diffuser plate is achieved.

In order to solve the above technical problems, the present invention provides a method for improving the brightness of a glass diffuser plate, comprising the following steps:

Step 1: Cut the glass into glass substrates;

Step 2: Print the diffusion coating on the upper and lower surfaces of the glass substrate, with a screen size of 300 meshes and a printing thickness of 8-10 μm;

In step 2, the diffusion coating is composed of the first ink and the second ink in a weight ratio of 1:1;

The first ink comprises: 50-60wt% titanium dioxide, with a particle diameter of 3 microns;

The second ink comprises: 20-25% titanium dioxide and 15-20% silicon dioxide.

Furthermore, the surface roughness Ra of the diffusion coating is 1.56-1.92 μm, and the light transmittance after printing is 47-53%.

Furthermore, in step 2, the average diameter of titanium dioxide particles in the first ink is 3 micrometers.

Furthermore, in step 2, the average diameter of titanium dioxide particles in the first ink is 5-6 microns, and the average diameter of silicon dioxide particles is 3 microns.

The beneficial effects of the present invention are:

1. By changing the particle size and component 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, so as to achieve the purpose of improving the overall brightness of the glass diffusion plate.

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below for detailed description as follows.

Detailed ways

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Example:

A method for improving the brightness of a glass diffusion plate comprises the following steps: step 1: cutting glass into glass substrates; step 2: printing a diffusion coating on the upper and lower surfaces of the glass substrate, with a printing screen mesh of 300 meshes and a printing thickness of 8-10 μm; in step 2, the diffusion coating is composed of a first ink and a second ink in a weight ratio of 1:1.

The first ink comprises: 50-60wt% titanium dioxide, with a particle diameter of 3 microns; the second ink comprises: 20-25% titanium dioxide and 15-20% silicon dioxide. The average particle diameter of the titanium dioxide in the first ink is 3 microns.

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

In this embodiment, the first ink may be of but not limited to 1203C type, and the second ink may be of but not limited to 1601 type. The large-particle titanium dioxide diffusion particles in 1601 ink have improved diffusion and shielding effects compared to the small-particle titanium dioxide diffusion particles in 1203C. The large-particle silicon dioxide particles in 1601 have a low refractive index and a low density (silicon dioxide density is 2.2g/cm3, titanium dioxide density is 3.9-4.2g/cm3). After the diffusion coating is printed, the large-particle silicon dioxide particles float up during the flow of the wet film, which increases the surface roughness of the coating, improves the diffusion effect of the coating, and improves the overall light transmittance of the film layer. Therefore, compared with 1203C ink, 1601 ink has the same shielding and diffusion effects, but has a higher light transmittance. When 1601 ink is applied alone to the glass surface, due to the large diffusion particles, the adhesion between the coating and the glass decreases, affecting the mechanical properties of the diffusion coating. The diffusion particles in 1203C ink are small and have a higher adhesion to the glass. When the two are mixed in a ratio of 1/1, the prepared diffusion coating has good optical and mechanical properties.

In summary, by changing the particle size and component ratio of the diffusion ink, the transmittance of the diffusion coating is improved, while the shielding effect and diffusion effect of the diffusion coating are guaranteed, so as to achieve the purpose of improving the overall brightness of the glass diffusion plate.

Example:

To make the glass diffusion plate, 1.1t ordinary soda-lime glass is used. 1203C+1601 mixed ink coating is printed on both sides with a mixing ratio of 1:1. OCA optical glue and DBEF optical film are then adhered to the surface of the diffusion coating in sequence, and its optical and mechanical properties are tested with a backlight module.

Comparative Example 1:

To make the glass diffusion plate, 1.1t ordinary soda-lime glass is used, and 1203C ink is printed on both sides. OCA optical glue and DBEF optical film are then adhered to the surface of the diffusion coating in sequence, and the optical and mechanical properties are tested with the backlight module.

Comparative Example 2:

To make the glass diffusion plate, 1.1t ordinary soda-lime glass is used, 1601 ink is printed on both sides, and then OCA optical glue and DBEF optical film are adhered to the surface of the diffusion coating in sequence, and its optical and mechanical properties are tested with the backlight module.

The brightness of the glass diffuser plate in the embodiment is increased by 10.1% compared with that in comparative example 1, and the transmittance is increased by 9.3%. The uniformity and adhesion are basically the same as those in comparative example 1. Although comparative example 2 has the highest brightness, the adhesion is reduced and cannot meet the mechanical strength requirements of the glass diffuser plate.

The various devices selected in this application are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims (4)

1. A method for improving the brightness of a glass diffusion plate, comprising the following steps:

step one: cutting the glass into glass substrates;

step two: printing diffusion coating on the upper and lower surfaces of the glass substrate, wherein the number of the printing screen is 300, and the printing thickness is 8-10 mu m;

in the second step, the diffusion coating is composed of a first ink and a second ink in a weight ratio of 1:1;

the first ink includes: 50-60wt% of titanium dioxide, the particle diameter being 3 microns;

the second ink includes: 20-25% of titanium dioxide and 15-20% of silicon dioxide.

2. The method of claim 1, wherein the glass diffuser plate comprises a plurality of glass substrates,

the surface roughness Ra of the diffusion coating is 1.56-1.92 mu m, so that the light transmittance after printing is 47-53%.

3. The method of claim 2, wherein the glass diffuser plate comprises a plurality of glass substrates,

in the second step, the average particle diameter of the titanium dioxide in the first ink was 3. Mu.m.

4. A method for improving a glass diffuser plate according to claim 3,

in the second step, the average diameter of the particles of the titanium dioxide in the first ink is 5-6 microns, and the average diameter of the silicon dioxide particles is 3 microns.